Skip to content

Commit

Permalink
minor doc tweaks
Browse files Browse the repository at this point in the history
  • Loading branch information
fingolfin committed Jun 28, 2021
1 parent 3c77267 commit 1911457
Show file tree
Hide file tree
Showing 6 changed files with 6 additions and 6 deletions.
2 changes: 1 addition & 1 deletion docs/src/CommutativeAlgebra/ca.md
Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ Pages = ["ca.md"]
# Introduction

The commutative algebra part of OSCAR provides functionality for handling
- ideals and modules over multivariated polynomial rings,
- ideals and modules over multivariate polynomial rings,
- quotient rings of such rings, with particular emphasis on affine $K$-algebras.

It is under development with regard to providing both the functionality and the documentation.
Expand Down
2 changes: 1 addition & 1 deletion docs/src/CommutativeAlgebra/ca_affine_algebras.md
Original file line number Diff line number Diff line change
Expand Up @@ -251,7 +251,7 @@ $A = \bigoplus_{d\geq 0} A_d$, where each graded piece $A_d$ is a finite dimensi
$K$-vector space. In this situation, the *Hilbert function* of $A$ is
the function

$H(A, \underline{\phantom{d}}): \N \rightarrow \N, d \mapsto \dim_K(d).$
$H(A, \underline{\phantom{d}}): \N \to \N, d \mapsto \dim_K(d).$

The *Hilbert series* of $A$ is the generating function

Expand Down
2 changes: 1 addition & 1 deletion docs/src/CommutativeAlgebra/ca_modules.md
Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ Pages = ["ca_modules.md"]
Modules over a multivariate polynomial ring are implemented as `subquotients`.
That is, they are submodules of quotients of free modules. Explicitly, the subquotient
$M$ with generators $A$ and relations $B$ over the ring $R$ is defined to be the module
$M = (\text{im } A + \text{im } B)/\text{im } B$, where $A: R^m\rightarrow R^p$ and $B: R^m\rightarrow R^p$
$M = (\text{im } A + \text{im } B)/\text{im } B$, where $A: R^m\to R^p$ and $B: R^m\to R^p$
are two matrices representing maps of free $R$-modules with the same codomain.

!!! note
Expand Down
2 changes: 1 addition & 1 deletion docs/src/Groups/autgroup.md
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ automorphism_group(G)
```
The evaluation of the automorphism `f` in the element `x` is analogous to the homomorphism evaluation: it can be obtained by typing either `f(x)` or `x^f`.

It is possible to turn an automorphism `f` into a homomorphism by typing `hom(f)`. The viceversa is also possible: if `g` is a bijective homomorphism from the group `G` to itself and `A` is the automorphism group of `G`, then the instruction `A(g)` returns `g` as automorphism of `G`. This is the standard way to build explicitly an automorphism (another way, available for inner automorphisms, is shown in Section [Inner_automorphisms](@ref inner_automorphisms)).
It is possible to turn an automorphism `f` into a homomorphism by typing `hom(f)`. The converse is also possible: if `g` is a bijective homomorphism from the group `G` to itself and `A` is the automorphism group of `G`, then the instruction `A(g)` returns `g` as automorphism of `G`. This is the standard way to build explicitly an automorphism (another way, available for inner automorphisms, is shown in Section [Inner_automorphisms](@ref inner_automorphisms)).

```@docs
automorphism_group(G::GAPGroup)
Expand Down
2 changes: 1 addition & 1 deletion docs/src/InvariantTheory/it.md
Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@ is its ring of invariants.

!!! note
Except where mentioned otherwise, we will be in the favourable situation where $G$ is a linear reductive group which acts rationally on $V$. This has several important consequences:
- There exists a Reynolds operator $\mathcal R: K[V] \rightarrow K[V]$. That is, $\mathcal R$ is a $K$-linear graded map which projects $K[V]$ onto $K[V]^G$, and which is a $K[V]^G$-module homomorphism;
- There exists a Reynolds operator $\mathcal R: K[V] \to K[V]$. That is, $\mathcal R$ is a $K$-linear graded map which projects $K[V]$ onto $K[V]^G$, and which is a $K[V]^G$-module homomorphism;
- by Hilbert's finiteness theorem, $K[V]^G$ is finitely generated as a $K$-algebra;
- by a result of Hochster and Roberts, $K[V]^G$ is Cohen-Macaulay. Equivalently, $K[V]^G$ is a free module (of finite rank) over any of its Noether normalizations.
If $k[V]^G$ is finitely generated as a $K$-algebra, we call any irredundant system of homogeneous generators a fundamental system of invariants of $k[V]^G$. By Nakayama's lemma, the number of elements in such a system is uniquely determined as the embedding dimension of $K[V]^G$. Similarly, the degrees of these elements are uniquely determined.
Expand Down
2 changes: 1 addition & 1 deletion docs/src/Rings/integer.md
Original file line number Diff line number Diff line change
Expand Up @@ -546,7 +546,7 @@ rising_factorial(ZZ(-30), 3)
* `primorial(n::Base.Int) -> Base.Int`
* `primorial(n::Oscar.Integer) -> Oscar.Integer`

Returns the promorial ``P(n)``, i.e. the product of all primes less than or
Returns the primorial ``P(n)``, i.e. the product of all primes less than or
equal to ``n``. An exception is raised if ``n < 0``. We define
``P(0) = P(1) = 1``.

Expand Down

0 comments on commit 1911457

Please sign in to comment.