diff --git a/README.md b/README.md
index 86ab419..14eb5c1 100644
--- a/README.md
+++ b/README.md
@@ -17,15 +17,15 @@ import torch
 from geometric_vector_perceptron import GVP
 
 model = GVP(
-    dim_coors_in = 1024,
+    dim_vectors_in = 1024,
     dim_feats_in = 512,
-    dim_coors_out = 256,
+    dim_vectors_out = 256,
     dim_feats_out = 512
 )
 
-feats, coors = (torch.randn(1, 512), torch.randn(1, 1024, 3))
+feats, vectors = (torch.randn(1, 512), torch.randn(1, 1024, 3))
 
-feats_out, coors_out = model(feats, coors) # (1, 256), (1, 512, 3)
+feats_out, vectors_out = model(feats, vectors) # (1, 256), (1, 512, 3)
 ```
 
 ## Citations
diff --git a/geometric_vector_perceptron/geometric_vector_perceptron.py b/geometric_vector_perceptron/geometric_vector_perceptron.py
index 98fe20d..1456f1f 100644
--- a/geometric_vector_perceptron/geometric_vector_perceptron.py
+++ b/geometric_vector_perceptron/geometric_vector_perceptron.py
@@ -6,37 +6,37 @@ class GVP(nn.Module):
     def __init__(
         self,
         *,
-        dim_coors_in,
+        dim_vectors_in,
         dim_feats_in,
         dim_feats_out,
-        dim_coors_out,
+        dim_vectors_out,
         feats_activation = nn.Sigmoid(),
-        coors_activation = nn.Sigmoid()
+        vectors_activation = nn.Sigmoid()
     ):
         super().__init__()
-        self.dim_coors_in = dim_coors_in
+        self.dim_vectors_in = dim_vectors_in
         self.dim_feats_in = dim_feats_in
 
-        self.dim_coors_out = dim_coors_out
-        dim_h = max(dim_coors_in, dim_coors_out)
+        self.dim_vectors_out = dim_vectors_out
+        dim_h = max(dim_vectors_in, dim_vectors_out)
 
-        self.Wh = nn.Parameter(torch.randn(dim_coors_in, dim_h))
-        self.Wu = nn.Parameter(torch.randn(dim_h, dim_coors_out))
+        self.Wh = nn.Parameter(torch.randn(dim_vectors_in, dim_h))
+        self.Wu = nn.Parameter(torch.randn(dim_h, dim_vectors_out))
 
-        self.coors_activation = coors_activation
+        self.vectors_activation = vectors_activation
 
         self.to_feats_out = nn.Sequential(
             nn.Linear(dim_h + dim_feats_in, dim_feats_out),
             feats_activation
         )
 
-    def forward(self, feats, coors):
-        b, n, _, v, c = *feats.shape, *coors.shape
+    def forward(self, feats, vectors):
+        b, n, _, v, c = *feats.shape, *vectors.shape
 
-        assert c == 3 and v == self.dim_coors_in, 'coordinates have wrong dimensions'
+        assert c == 3 and v == self.dim_vectors_in, 'coordinates have wrong dimensions'
         assert n == self.dim_feats_in, 'scalar features have wrong dimensions'
 
-        Vh = einsum('b v c, v h -> b h c', coors, self.Wh)
+        Vh = einsum('b v c, v h -> b h c', vectors, self.Wh)
         Vu = einsum('b h c, h u -> b u c', Vh, self.Wu)
 
         sh = torch.norm(Vh, p = 2, dim = -1)
@@ -45,6 +45,6 @@ def forward(self, feats, coors):
         s = torch.cat((feats, sh), dim = 1)
 
         feats_out = self.to_feats_out(s)
-        coors_out = self.coors_activation(vu) * Vu
+        vectors_out = self.vectors_activation(vu) * Vu
 
-        return feats_out, coors_out
+        return feats_out, vectors_out
diff --git a/setup.py b/setup.py
index 3bd0628..bcd5d16 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 setup(
   name = 'geometric-vector-perceptron',
   packages = find_packages(),
-  version = '0.0.1',
+  version = '0.0.2',
   license='MIT',
   description = 'Geometric Vector Perceptron - Pytorch',
   author = 'Phil Wang',
diff --git a/tests.py b/tests.py
index 4486ebc..2af1a0c 100644
--- a/tests.py
+++ b/tests.py
@@ -7,21 +7,26 @@ def random_rotation():
     q, r = torch.qr(torch.randn(3, 3))
     return q
 
+def diff_matrix(vectors):
+    b, _, d = vectors.shape
+    diff = vectors[..., None, :] - vectors[:, None, ...]
+    return diff.reshape(b, -1, d)
+
 def test_equivariance():
     R = random_rotation()
 
     model = GVP(
-        dim_coors_in = 1024,
+        dim_vectors_in = 1024,
         dim_feats_in = 512,
-        dim_coors_out = 256,
+        dim_vectors_out = 256,
         dim_feats_out = 512
     )
 
     feats = torch.randn(1, 512)
-    coors = torch.randn(1, 1024, 3)
+    vectors = torch.randn(1, 32, 3)
 
-    feats_out, coors_out = model(feats, coors)
-    feats_out_r, coors_out_r = model(feats, coors @ R)
+    feats_out, vectors_out = model(feats, diff_matrix(vectors))
+    feats_out_r, vectors_out_r = model(feats, diff_matrix(vectors @ R))
 
-    err = ((coors_out @ R) - coors_out_r).max()
+    err = ((vectors_out @ R) - vectors_out_r).max()
     assert err < TOL, 'equivariance must be respected'