diff --git a/_data/package.json b/_data/package.json
index b23b1ea..9dad320 100644
--- a/_data/package.json
+++ b/_data/package.json
@@ -1,7 +1,7 @@
 {
   "name": "algebra",
   "description": "means completeness and balancing, from the Arabic word الجبر",
-  "version": "0.9.0",
+  "version": "0.10.0",
   "engines": {
     "node": ">= 4.4.0"
   },
@@ -13,9 +13,7 @@
   "license": "MIT",
   "main": "index.js",
   "scripts": {
-    "_build": "npm test && npm run browserify && npm run minify && npm run tex && npm run jekyll; git status",
-    "_pull": "git pull origin master && npm run gh-pages:pull",
-    "_push": "git push origin master && npm run gh-pages:push",
+    "build": "npm test && npm run browserify && npm run minify && npm run tex && npm run jekyll; git status",
     "browserify": "npm run browserify:dist; npm run browserify:test",
     "browserify:dist": "browserify -r ./index.js:${npm_package_name} -t babelify -o dist/${npm_package_name}.js",
     "browserify:test": "browserify test/*.js -t babelify -o gh-pages/test/bundle.js",
@@ -39,7 +37,12 @@
     "tex:display": "ls gh-pages/tex-snippets/display/*.tex | while read texfile; do cat $texfile | katex --display-mode > gh-pages/_includes/display/$(basename ${texfile%.tex}).html; done",
     "tex:inline": "ls gh-pages/tex-snippets/inline/*.tex | while read texfile; do cat $texfile | katex > gh-pages/_includes/inline/$(basename ${texfile%.tex}).html; done",
     "postversion": "git push origin v${npm_package_version}; npm publish; npm run _push",
-    "test": "mocha --reporter min"
+    "postpublish": "npm run gh-pages:_data; git commit -am ':arrow_up: updated version'; npm run push",
+    "postupdate-deps": "npm test && git commit -am ':arrow_up: updated deps' || git checkout -- package.json",
+    "pull": "git pull origin master && npm run gh-pages:pull",
+    "push": "git push origin master && npm run gh-pages:push",
+    "test": "mocha --reporter min",
+    "update-deps": "npm update --save --dev"
   },
   "pre-commit": [
     "lint",
@@ -50,6 +53,7 @@
     "type": "git",
     "url": "git://github.com/fibo/algebra.git"
   },
+  "changelog": "gh-pages/changelog.md",
   "keywords": [
     "algebra",
     "matrix",
@@ -65,14 +69,13 @@
     "babelify": "^7.2.0",
     "browserify": "^13.0.0",
     "coveralls": "^2.11.9",
-    "install": "^0.6.1",
     "istanbul": "^0.4.1",
-    "katex": "^0.5.1",
+    "katex": "^0.6.0",
     "mocha": "^2.3.4",
     "mocha-lcov-reporter": "1.2.0",
     "pre-commit": "^1.1.2",
-    "should": "^8.3.1",
-    "standard": "^6.0.8",
+    "should": "^9.0.0",
+    "standard": "^7.0.0",
     "uglify-js": "^2.6.2"
   },
   "dependencies": {
@@ -80,7 +83,6 @@
     "cayley-dickson": "^0.3.0",
     "indices-permutations": "^0.2.0",
     "inherits": "^2.0.1",
-    "is-integer": "^1.0.6",
     "laplace-determinant": "^0.1.0",
     "matrix-multiplication": "^0.4.0",
     "multidim-array-index": "^0.5.0",
diff --git a/_data/tags.json b/_data/tags.json
index 2c447a7..45cf6d7 100644
--- a/_data/tags.json
+++ b/_data/tags.json
@@ -1,4 +1,13 @@
 [
+  {
+    "name": "v0.10.0",
+    "zipball_url": "https://api.github.com/repos/fibo/algebra/zipball/v0.10.0",
+    "tarball_url": "https://api.github.com/repos/fibo/algebra/tarball/v0.10.0",
+    "commit": {
+      "sha": "f403137ce9c5c5a8eb2467a2fbcbf989df02ff75",
+      "url": "https://api.github.com/repos/fibo/algebra/commits/f403137ce9c5c5a8eb2467a2fbcbf989df02ff75"
+    }
+  },
   {
     "name": "v0.9.0",
     "zipball_url": "https://api.github.com/repos/fibo/algebra/zipball/v0.9.0",
diff --git a/changelog.md b/changelog.md
index a6935ee..4b98b4e 100644
--- a/changelog.md
+++ b/changelog.md
@@ -15,8 +15,13 @@ Changelog format adheres to [Keep a Changelog](http://keepachangelog.com/)</sub>
 
 ## [Unreleased]
 
+## [v0.10.1] - 2016-06-09
+
 - Replaced jshint with standardjs
 - fixed math formulas rendering in blog
+- few tests added
+- few doc improvements
+- using new static-props features
 
 ## [v0.10.0] - 2016-04-16
 
diff --git a/index.md b/index.md
index 4ffb361..13ea05c 100644
--- a/index.md
+++ b/index.md
@@ -5,7 +5,7 @@ title: algebra
 
 > Vectors, Matrices; Real, Complex, Quaternion; custom groups and rings for Node.js
 
-[![Node engine](https://img.shields.io/node/v/algebra.svg)](https://nodejs.org/en/) [![NPM version](https://badge.fury.io/js/algebra.svg)](http://badge.fury.io/js/algebra) [![Build Status](https://travis-ci.org/fibo/algebra.svg?branch=master)](https://travis-ci.org/fibo/algebra?branch=master) [![Dependency Status](https://gemnasium.com/fibo/algebra.svg)](https://gemnasium.com/fibo/algebra) [![Coverage Status](https://coveralls.io/repos/fibo/algebra/badge.svg?branch=master)](https://coveralls.io/r/fibo/algebra?branch=master) [![Test page](https://img.shields.io/badge/test-page-blue.svg)](http://g14n.info/algebra/test) [![Change log](https://img.shields.io/badge/change-log-blue.svg)](http://g14n.info/algebra/changelog)
+[![Node engine](https://img.shields.io/node/v/algebra.svg)](https://nodejs.org/en/) [![NPM version](https://badge.fury.io/js/algebra.svg)](http://badge.fury.io/js/algebra) [![Build Status](https://travis-ci.org/fibo/algebra.svg?branch=master)](https://travis-ci.org/fibo/algebra?branch=master) [![Dependency Status](https://david-dm.org/fibo/algebra.svg)](https://david-dm.org/fibo/algebra) [![Coverage Status](https://coveralls.io/repos/fibo/algebra/badge.svg?branch=master)](https://coveralls.io/r/fibo/algebra?branch=master) [![Test page](https://img.shields.io/badge/test-page-blue.svg)](http://g14n.info/algebra/test) [![Change log](https://img.shields.io/badge/change-log-blue.svg)](http://g14n.info/algebra/changelog)
 
 [![Whatchers](https://g14n.info/svg/github/watchers/algebra.svg)](https://github.com/fibo/algebra/watchers) [![Stargazers](https://g14n.info/svg/github/stars/algebra.svg)](https://github.com/fibo/algebra/stargazers) [![Forks](https://g14n.info/svg/github/forks/algebra.svg)](https://github.com/fibo/algebra/network/members)
 
@@ -13,7 +13,7 @@ title: algebra
 
 ![Algebra](http://g14n.info/algebra/images/Cover-Algebra.png) ![OnQuaternionsAndOctonions](http://g14n.info/algebra/images/Cover-OnQuaternionsAndOctonions.png)
 
-**Table Of Contents:**
+## Table Of Contents
 
 * [Status](#status)
 * [Features](#features)
@@ -26,56 +26,14 @@ title: algebra
   - [About operators](#about-operators)
   - [Cyclic](#cyclic)
   - [Scalar](#scalar)
-    - [attributes](#scalar-attributes)
-      - [one](#scalarone)
-      - [zero](#scalarzero)
-      - [data](#scalardata)
-      - [order](#scalar-order)
-    - [operators](#scalar-operators)
-      - [equality](#scalar-equality)
-      - [disequality](#scalar-disequality)
-      - [addition](#scalar-addition)
-      - [subtraction](#scalar-subtraction)
-      - [multiplication](#scalar-multiplication)
-      - [division](#scalar-division)
-      - [negation](#scalar-negation)
-      - [inversion](#scalar-inversion)
-      - [conjugation](#scalar-conjugation)
   - [Real](#real)
   - [Complex](#complex)
   - [Quaternion](#quaternion)
   - [Octonion](#octonion)
   - [Common spaces](#common-spaces)
-    - [R](#r)
-    - [R2](#r2)
-    - [R3](#r3)
-    - [R2x2](#r2x2)
-    - [C](#c)
-    - [H](#h)
   - [Vector](#vector)
-    - [attributes](#vector-attributes)
-    - [operators](#vector-operators)
-      - [cross product](#cross-product)
   - [Matrix](#matrix)
-    - [attributes](#matrix-attributes)
-      - [isSquare](#matrixissquare)
-      - [numCols](#matrixnumcols)
-      - [numRows](#matrixnumrows)
-    - [operators](#matrix-operators)
-      - [multiplication](#matrix-multiplication)
-      - [inversion](#matrix-inversion)
-      - [determinant](#matrix-determinant)
-      - [adjoint](#matrix-adjoint)
   - [Tensor](#tensor)
-    - [attributes](#tensor-attributes)
-      - [one](#tensorone)
-      - [zero](#tensorzero)
-      - [data](#tensordata)
-      - [indices](#tensor-indices)
-      - [order](#tensor-order)
-    - [operators](#tensor-operators)
-      - [equality](#tensor-equality)
-      - [scalarMultiplication](#scalar-multiplication)
 * [License](#license)
 
 ## Status
@@ -86,21 +44,21 @@ I am currently adding more tests and examples to achieve a stable version.
 
 Many functionalities of previous versions are now in separated atomic packages:
 
-* [algebra-cyclic](http://npm.im/algebra-cyclic)
-* [algebra-group](http://npm.im/algebra-group)
-* [algebra-ring][algebra-ring]
-* [cayley-dickson](http://npm.im/cayley-dickson)
-* [indices-permutations](http://npm.im/indices-permutations)
-* [laplace-determinant](http://npm.im/laplace-determinant)
-* [matrix-multiplication](http://npm.im/matrix-multiplication)
-* [multidim-array-index](http://npm.im/multidim-array-index)
-* [tensor-contraction](http://npm.im/tensor-contraction)
-* [tensor-permutation](http://npm.im/tensor-product)
+* [algebra-cyclic]
+* [algebra-group]
+* [algebra-ring]
+* [cayley-dickson]
+* [indices-permutations]
+* [laplace-determinant]
+* [matrix-multiplication]
+* [multidim-array-index]
+* [tensor-contraction]
+* [tensor-permutation]
 
 ## Features
 
 * Real, Complex, Quaternion, Octonion numbers.
-* [Vector](#vectors) and [Matrix](#matrices) spaces over any field (included [Real numbers](#scalars), of course :).
+* [Vector](#vectors) and [Matrix](#matrices) spaces over any field (included [Real numbers](#real), of course :).
 * Expressive syntax.
 * Everything is a Tensor.
 * [Immutable objects](https://en.wikipedia.org/wiki/Immutable_object).
@@ -108,13 +66,13 @@ Many functionalities of previous versions are now in separated atomic packages:
 
 ## Installation
 
-With [npm](https://npmjs.org/) do
+With [npm] do
 
 ```bash
 npm install algebra
 ```
 
-With [bower](http://bower.io/) do
+With [bower] do
 
 ```bash
 bower install algebra
@@ -576,10 +534,43 @@ Inherits everything from [Tensor](#tensor).
 
 ### Vector attributes
 
-##### `Vector.dimension`
+#### Vector dimension
+
+##### `Vector dimension`
+
+```javascript
+R2.dimension // 2
+```
+
+##### `vector.dimension`
+
+```javascript
+var vector = new R2([1, 1])
+
+vector.dimension // 2
+```
 
 ### Vector operators
 
+#### Addition
+
+##### `Vector.addition(vector1, vector2)`
+
+```javascript
+R2.addition([2, 1], [1, 2]) // [3, 3]
+```
+
+##### `vector1.addition(vector2)`
+
+```javascript
+var vector1 = new R2([2, 1])
+var vector2 = new R2([2, 2])
+
+var vector3 = vector1.addition(vector2)
+
+vector3 // Vector { data: [4, 3] }
+```
+
 #### Cross product
 
 It is defined only in dimension three. See [Cross product on wikipedia](https://en.wikipedia.org/wiki/Cross_product).
@@ -736,8 +727,19 @@ tensor2.equality(tensor2) // false
 
 [MIT](http://g14n.info/mit-license/)
 
+[npm]: https://npmjs.org/
+[bower]: http://bower.io/
 [blog]: http://g14n.info/algebra/articles "algebra blog"
-[algebra-ring]: http://npm.im/algebra-ring "algebra-ring"
 [composition-algebra]: https://en.wikipedia.org/wiki/Composition_algebra "Composition algebra"
 [booleanField]: https://github.com/fibo/algebra/blob/master/src/booleanField.js "boolean field"
 [realField]: https://github.com/fibo/algebra/blob/master/src/realField.js "real field"
+[algebra-cyclic]: http://npm.im/algebra-cyclic
+[algebra-group]: http://npm.im/algebra-group
+[algebra-ring]: http://npm.im/algebra-ring
+[cayley-dickson]: http://npm.im/cayley-dickson
+[indices-permutations]: http://npm.im/indices-permutations
+[laplace-determinant]: http://npm.im/laplace-determinant
+[matrix-multiplication]: http://npm.im/matrix-multiplication
+[multidim-array-index]: http://npm.im/multidim-array-index
+[tensor-contraction]: http://npm.im/tensor-contraction
+[tensor-permutation]: http://npm.im/tensor-product
diff --git a/test/bundle.js b/test/bundle.js
index 5263f19..f352f9c 100644
--- a/test/bundle.js
+++ b/test/bundle.js
@@ -199,11 +199,11 @@ module.exports = staticProps
 module.exports={
   "_args": [
     [
-      "algebra-cyclic@^0.2.0",
+      "algebra-cyclic@0.2.0",
       "/home/io/github.com/fibo/algebra"
     ]
   ],
-  "_from": "algebra-cyclic@>=0.2.0 <0.3.0",
+  "_from": "algebra-cyclic@0.2.0",
   "_id": "algebra-cyclic@0.2.0",
   "_inCache": true,
   "_installable": true,
@@ -221,18 +221,19 @@ module.exports={
   "_phantomChildren": {},
   "_requested": {
     "name": "algebra-cyclic",
-    "raw": "algebra-cyclic@^0.2.0",
-    "rawSpec": "^0.2.0",
+    "raw": "algebra-cyclic@0.2.0",
+    "rawSpec": "0.2.0",
     "scope": null,
-    "spec": ">=0.2.0 <0.3.0",
-    "type": "range"
+    "spec": "0.2.0",
+    "type": "version"
   },
   "_requiredBy": [
     "/"
   ],
+  "_resolved": "https://registry.npmjs.org/algebra-cyclic/-/algebra-cyclic-0.2.0.tgz",
   "_shasum": "d66e5dd19c8dab497c9115456376b3ab84b7756b",
   "_shrinkwrap": null,
-  "_spec": "algebra-cyclic@^0.2.0",
+  "_spec": "algebra-cyclic@0.2.0",
   "_where": "/home/io/github.com/fibo/algebra",
   "author": {
     "name": "Gianluca Casati",
@@ -1119,11 +1120,11 @@ arguments[4][3][0].apply(exports,arguments)
 module.exports={
   "_args": [
     [
-      "matrix-multiplication@^0.4.0",
+      "matrix-multiplication@0.4.0",
       "/home/io/github.com/fibo/algebra"
     ]
   ],
-  "_from": "matrix-multiplication@>=0.4.0 <0.5.0",
+  "_from": "matrix-multiplication@0.4.0",
   "_id": "matrix-multiplication@0.4.0",
   "_inCache": true,
   "_installable": true,
@@ -1141,18 +1142,19 @@ module.exports={
   "_phantomChildren": {},
   "_requested": {
     "name": "matrix-multiplication",
-    "raw": "matrix-multiplication@^0.4.0",
-    "rawSpec": "^0.4.0",
+    "raw": "matrix-multiplication@0.4.0",
+    "rawSpec": "0.4.0",
     "scope": null,
-    "spec": ">=0.4.0 <0.5.0",
-    "type": "range"
+    "spec": "0.4.0",
+    "type": "version"
   },
   "_requiredBy": [
     "/"
   ],
+  "_resolved": "https://registry.npmjs.org/matrix-multiplication/-/matrix-multiplication-0.4.0.tgz",
   "_shasum": "d63c0885ecd788fa9290c16f483ef50fa16c13a1",
   "_shrinkwrap": null,
-  "_spec": "matrix-multiplication@^0.4.0",
+  "_spec": "matrix-multiplication@0.4.0",
   "_where": "/home/io/github.com/fibo/algebra",
   "author": {
     "name": "Gianluca Casati",
@@ -1282,11 +1284,11 @@ module.exports = multiDimArrayIndex
 module.exports={
   "_args": [
     [
-      "multidim-array-index@^0.5.0",
+      "multidim-array-index@0.5.0",
       "/home/io/github.com/fibo/algebra"
     ]
   ],
-  "_from": "multidim-array-index@>=0.5.0 <0.6.0",
+  "_from": "multidim-array-index@0.5.0",
   "_id": "multidim-array-index@0.5.0",
   "_inCache": true,
   "_installable": true,
@@ -1304,18 +1306,19 @@ module.exports={
   "_phantomChildren": {},
   "_requested": {
     "name": "multidim-array-index",
-    "raw": "multidim-array-index@^0.5.0",
-    "rawSpec": "^0.5.0",
+    "raw": "multidim-array-index@0.5.0",
+    "rawSpec": "0.5.0",
     "scope": null,
-    "spec": ">=0.5.0 <0.6.0",
-    "type": "range"
+    "spec": "0.5.0",
+    "type": "version"
   },
   "_requiredBy": [
     "/"
   ],
+  "_resolved": "https://registry.npmjs.org/multidim-array-index/-/multidim-array-index-0.5.0.tgz",
   "_shasum": "34aceea031769c419df016819329142b0332bd07",
   "_shrinkwrap": null,
-  "_spec": "multidim-array-index@^0.5.0",
+  "_spec": "multidim-array-index@0.5.0",
   "_where": "/home/io/github.com/fibo/algebra",
   "author": {
     "name": "Gianluca Casati",
@@ -1882,9 +1885,9 @@ function MatrixSpace(Scalar) {
           trace: trace(data)
         });
 
-        Object.defineProperties(this, {
-          determinant: { get: computeDeterminant },
-          det: { get: computeDeterminant }
+        staticProps(this)({
+          determinant: computeDeterminant,
+          det: computeDeterminant
         });
       }
 
@@ -1900,9 +1903,9 @@ function MatrixSpace(Scalar) {
         }
       }
 
-      Object.defineProperties(this, {
-        transposed: { get: transposed },
-        tr: { get: transposed }
+      staticProps(this)({
+        transposed: transposed,
+        tr: transposed
       });
     }
 
@@ -2646,25 +2649,22 @@ describe('CompositionAlgebra', function () {
 },{"../src/CompositionAlgebra":28,"../src/realField":37}],41:[function(require,module,exports){
 'use strict';
 
-var algebra = require('algebra');
+describe('MatrixSpace', function () {
+  var algebra = require('algebra');
 
-var notDefined = require('not-defined');
+  var notDefined = require('not-defined');
 
-var MatrixSpace = algebra.MatrixSpace;
-var Real = algebra.Real;
-var VectorSpace = algebra.VectorSpace;
+  var MatrixSpace = algebra.MatrixSpace;
+  var Real = algebra.Real;
 
-var methodBinaryOperator = require('./features/methodBinaryOperator');
-var methodUnaryOperator = require('./features/methodUnaryOperator');
-var staticBinaryOperator = require('./features/staticBinaryOperator');
-var staticUnaryOperator = require('./features/staticUnaryOperator');
+  var methodBinaryOperator = require('./features/methodBinaryOperator');
+  var staticBinaryOperator = require('./features/staticBinaryOperator');
+  var staticUnaryOperator = require('./features/staticUnaryOperator');
 
-describe('MatrixSpace', function () {
   var R1x4 = MatrixSpace(Real)(1, 4);
   var R2x3 = MatrixSpace(Real)(2, 3);
   var R2x2 = MatrixSpace(Real)(2);
   var R3x2 = MatrixSpace(Real)(3, 2);
-  var R4 = VectorSpace(Real)(4);
 
   it('has signature (Scalar)(numRows, numCols)', function () {
     R2x3.numRows.should.be.eql(2);
@@ -2766,9 +2766,9 @@ describe('MatrixSpace', function () {
   });
 
   describe('trace()', function () {
-    it('is a static method', function () {
-      R2x2.trace([1, 2, 5, 6]).should.be.eql(7);
-    });
+    var operator = 'trace';
+
+    it('is a static method', staticUnaryOperator(R2x2, operator, [1, 2, 5, 6], 7));
 
     it('is not available for no square matrices', function () {
       notDefined(R3x2.trace).should.be.true;
@@ -2853,14 +2853,14 @@ describe('MatrixSpace', function () {
 
   describe('tr', function () {
     it('is an alias of transposed', function () {
-      var matrix = new R2x2([0, 1, 1, 0]);
+      var matrix = new R3x2([0, 1, 1, 0, 2, 2]);
 
-      matrix.tr.should.be.eql(matrix.transposed);
+      matrix.tr.data.should.be.eql(matrix.transposed.data);
     });
   });
 });
 
-},{"./features/methodBinaryOperator":49,"./features/methodUnaryOperator":50,"./features/staticBinaryOperator":51,"./features/staticUnaryOperator":52,"algebra":53,"not-defined":20}],42:[function(require,module,exports){
+},{"./features/methodBinaryOperator":49,"./features/staticBinaryOperator":51,"./features/staticUnaryOperator":52,"algebra":53,"not-defined":20}],42:[function(require,module,exports){
 'use strict';
 
 var algebra = require('algebra');
@@ -2873,7 +2873,8 @@ var staticBinaryOperator = require('./features/staticBinaryOperator');
 var staticUnaryOperator = require('./features/staticUnaryOperator');
 
 describe('Real', function () {
-  var operator, x;
+  var operator;
+  var x;
 
   describe('zero', function () {
     it('is static', function () {
@@ -2894,9 +2895,6 @@ describe('Real', function () {
 
     it('is a class method', methodBinaryOperator(R, operator, 1, 2, 3));
 
-    // TODO
-    //it('accepts many arguments', multiArgumentOperator(R, operator, 1, [2, 3, 4], 10))
-
     it('accepts many arguments', function () {
       x = new R(1);
       x = x.addition(2, 3, 4);
@@ -3111,22 +3109,25 @@ describe('TensorSpace', function () {
     describe('order', function () {
       it('is 0 for scalars', function () {
         var Scalar = TensorSpace(Real)([1]);
-        var scalar1 = new Scalar(4);
         Scalar.order.should.eql(0);
+
+        var scalar1 = new Scalar(4);
         scalar1.order.should.eql(0);
       });
 
       it('is 1 for vectors', function () {
         var Vector = TensorSpace(Real)([2]);
-        var vector1 = new Vector([1, 2]);
         Vector.order.should.eql(1);
+
+        var vector1 = new Vector([1, 2]);
         vector1.order.should.eql(1);
       });
 
       it('is 2 for matrices', function () {
         var Matrix = TensorSpace(Real)([2, 2]);
-        var matrix1 = new Matrix([1, 2, 3, 4]);
         Matrix.order.should.eql(2);
+
+        var matrix1 = new Matrix([1, 2, 3, 4]);
         matrix1.order.should.eql(2);
       });
     });
@@ -3180,20 +3181,16 @@ describe('TensorSpace', function () {
 var algebra = require('algebra');
 var notDefined = require('not-defined');
 
-var MatrixSpace = algebra.MatrixSpace;
 var Real = algebra.Real;
 var VectorSpace = algebra.VectorSpace;
 
 var methodBinaryOperator = require('./features/methodBinaryOperator');
-var methodUnaryOperator = require('./features/methodUnaryOperator');
 var staticBinaryOperator = require('./features/staticBinaryOperator');
 var staticUnaryOperator = require('./features/staticUnaryOperator');
 
 var R2 = VectorSpace(Real)(2);
 var R3 = VectorSpace(Real)(3);
 
-var R2x2 = MatrixSpace(Real)(2, 2);
-
 describe('VectorSpace', function () {
   var operator;
 
@@ -3298,22 +3295,23 @@ describe('VectorSpace', function () {
   });
 
   describe('norm()', function () {
+    var operator = 'norm';
+
     it('is a static method', function () {
-      R2.norm([0, 1]).data.should.be.eql(1);
-      R3.norm([1, 1, 2]).data.should.be.eql(6);
+      staticUnaryOperator(R2, operator, [0, 1], 1);
+      staticUnaryOperator(R3, operator, [1, 1, 2], 6);
     });
   });
 
   describe('crossProduct()', function () {
+    var operator = 'crossProduct';
+
     it('is a static method', function () {
-      R3.crossProduct([3, -3, 1], [4, 9, 2]).should.be.eql([-15, -2, 39]);
+      staticBinaryOperator(R3, operator, [3, -3, 1], [4, 9, 2], [-15, -2, 39]);
     });
 
     it('is a class method', function () {
-      var vector1 = new R3([3, -3, 1]);
-      var vector2 = new R3([-12, 12, -4]);
-
-      vector1.crossProduct(vector2).data.should.be.eql([0, 0, 0]);
+      methodBinaryOperator(R3, operator, [3, -3, 1], [-12, 12, -4], [0, 0, 0]);
     });
 
     it('is defined only in dimension 3', function () {
@@ -3334,7 +3332,7 @@ describe('VectorSpace', function () {
   });
 });
 
-},{"./features/methodBinaryOperator":49,"./features/methodUnaryOperator":50,"./features/staticBinaryOperator":51,"./features/staticUnaryOperator":52,"algebra":53,"not-defined":20}],46:[function(require,module,exports){
+},{"./features/methodBinaryOperator":49,"./features/staticBinaryOperator":51,"./features/staticUnaryOperator":52,"algebra":53,"not-defined":20}],46:[function(require,module,exports){
 'use strict';
 
 describe('API', function () {
@@ -3347,9 +3345,12 @@ describe('API', function () {
   var R = algebra.R;
   var R2 = algebra.R2;
   var R3 = algebra.R3;
+  var R2x2 = algebra.R2x2;
   var Real = algebra.Real;
   var Scalar = algebra.Scalar;
+  var MatrixSpace = algebra.MatrixSpace;
   var TensorSpace = algebra.TensorSpace;
+  var VectorSpace = algebra.VectorSpace;
 
   var booleanField = require('../src/booleanField');
 
@@ -3429,40 +3430,64 @@ describe('API', function () {
 
   describe('Common spaces', function () {
     describe('R', function () {
-      it('is an alias', function () {
+      it('is an alias of Real', function () {
         R.should.be.eql(Real);
       });
     });
 
     describe('R2', function () {
-      it();
+      it('is an alias of VectorSpace(Real)(2)', function () {
+        R2.should.be.eql(VectorSpace(Real)(2));
+      });
     });
 
-    /* 'is an alias', () => {
-    }*/describe('R3', function () {
-      it();
+    describe('R3', function () {
+      it('is an alias of VectorSpace(Real)(3)', function () {
+        R3.should.be.eql(VectorSpace(Real)(3));
+      });
     });
 
-    /* 'is an alias', () => {
-    }*/describe('R2x2', function () {
-      it();
+    describe('R2x2', function () {
+      it('is an alias of MatrixSpace(Real)(2)', function () {
+        R2x2.should.be.eql(MatrixSpace(Real)(2));
+      });
     });
 
-    /* 'is an alias', () => {
-    }*/describe('C', function () {
-      it('is an alias', function () {
+    describe('C', function () {
+      it('is an alias of Complex', function () {
         C.should.be.eql(Complex);
       });
     });
 
     describe('H', function () {
-      it('is an alias', function () {
+      it('is an alias of Quaternion', function () {
         H.should.be.eql(Quaternion);
       });
     });
   });
 
-  describe('Tensor', function () {
+  describe('Vector', function () {
+    describe('vector.dimension', function () {
+      it('is an attribute', function () {
+        var vector = new R2([1, 1]);
+
+        vector.dimension.should.eql(2);
+      });
+    });
+
+    describe('addition', function () {
+      it('works', function () {
+        R2.addition([2, 1], [1, 2]).should.deepEqual([3, 3]);
+
+        var vector1 = new R2([2, 1]);
+        var vector2 = new R2([2, 2]);
+
+        var vector3 = vector1.addition(vector2);
+
+        vector3.data.should.deepEqual([4, 3]);
+      });
+    });
+
     describe('Cross product', function () {
       it('works', function () {
         R3.crossProduct([3, -3, 1], [4, 9, 2]).should.deepEqual([-15, -2, 39]);