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diff --git a/src/Tests/Cube.hs b/src/Tests/Cube.hs
deleted file mode 100644
index 2fd8cb6..0000000
--- a/src/Tests/Cube.hs
+++ /dev/null
@@ -1,506 +0,0 @@
-module Tests.Cube
-where
-
-import Prelude hiding (LT)
-
-import Cardinal
-import Comparisons
-import Cube hiding (i, j, k)
-import FunctionValues
-import Misc (all_equal, disjoint)
-import Tetrahedron (b0, b1, b2, b3, c, fv,
-                    v0, v1, v2, v3, volume)
-
-
--- Quickcheck tests.
-
-prop_opposite_octant_tetrahedra_disjoint1 :: Cube -> Bool
-prop_opposite_octant_tetrahedra_disjoint1 c =
-  disjoint (front_left_top_tetrahedra c) (front_right_down_tetrahedra c)
-
-prop_opposite_octant_tetrahedra_disjoint2 :: Cube -> Bool
-prop_opposite_octant_tetrahedra_disjoint2 c =
-  disjoint (back_left_top_tetrahedra c) (back_right_down_tetrahedra c)
-
-prop_opposite_octant_tetrahedra_disjoint3 :: Cube -> Bool
-prop_opposite_octant_tetrahedra_disjoint3 c =
-  disjoint (front_left_top_tetrahedra c) (back_right_top_tetrahedra c)
-
-prop_opposite_octant_tetrahedra_disjoint4 :: Cube -> Bool
-prop_opposite_octant_tetrahedra_disjoint4 c =
-  disjoint (front_left_down_tetrahedra c) (back_right_down_tetrahedra c)
-
-prop_opposite_octant_tetrahedra_disjoint5 :: Cube -> Bool
-prop_opposite_octant_tetrahedra_disjoint5 c =
-  disjoint (front_left_top_tetrahedra c) (back_left_down_tetrahedra c)
-
-prop_opposite_octant_tetrahedra_disjoint6 :: Cube -> Bool
-prop_opposite_octant_tetrahedra_disjoint6 c =
-  disjoint (front_right_top_tetrahedra c) (back_right_down_tetrahedra c)
-
-
--- | Since the grid size is necessarily positive, all tetrahedra
---   (which comprise cubes of positive volume) must have positive volume
---   as well.
-prop_all_volumes_positive :: Cube -> Bool
-prop_all_volumes_positive cube =
-    null nonpositive_volumes
-    where
-      ts = tetrahedra cube
-      volumes = map volume ts
-      nonpositive_volumes = filter (<= 0) volumes
-
--- | In fact, since all of the tetrahedra are identical, we should
---   already know their volumes. There's 24 tetrahedra to a cube, so
---   we'd expect the volume of each one to be (1/24)*h^3.
-prop_all_volumes_exact :: Cube -> Bool
-prop_all_volumes_exact cube =
-    and [volume t ~~= (1/24)*(delta^(3::Int)) | t <- tetrahedra cube]
-    where
-      delta = h cube
-
--- | All tetrahedron should have their v0 located at the center of the cube.
-prop_v0_all_equal :: Cube -> Bool
-prop_v0_all_equal cube = (v0 t0) == (v0 t1)
-    where
-      t0 = head (tetrahedra cube) -- Doesn't matter which two we choose.
-      t1 = head $ tail (tetrahedra cube)
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). Note that the
---   third and fourth indices of c-t1 have been switched. This is
---   because we store the triangles oriented such that their volume is
---   positive. If T and T-tilde share \<v0,v1,v2\> and v3,v3-tilde point
---   in opposite directions, one of them has to have negative volume!
-prop_c0120_identity1 :: Cube -> Bool
-prop_c0120_identity1 cube =
-   c t0 0 1 2 0 ~= (c t0 0 0 2 1 + c t3 0 0 1 2) / 2
-     where
-       t0 = tetrahedron cube 0
-       t3 = tetrahedron cube 3
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). Repeats
---   'prop_c0120_identity1' with tetrahedrons 1 and 2.
-prop_c0120_identity2 :: Cube -> Bool
-prop_c0120_identity2 cube =
-   c t1 0 1 2 0 ~= (c t1 0 0 2 1 + c t0 0 0 1 2) / 2
-     where
-       t0 = tetrahedron cube 0
-       t1 = tetrahedron cube 1
-            
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). Repeats
---   'prop_c0120_identity1' with tetrahedrons 1 and 2.
-prop_c0120_identity3 :: Cube -> Bool
-prop_c0120_identity3 cube =
-   c t2 0 1 2 0 ~= (c t2 0 0 2 1 + c t1 0 0 1 2) / 2
-     where
-       t1 = tetrahedron cube 1
-       t2 = tetrahedron cube 2
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). Repeats
---   'prop_c0120_identity1' with tetrahedrons 2 and 3.
-prop_c0120_identity4 :: Cube -> Bool
-prop_c0120_identity4 cube =
-   c t3 0 1 2 0 ~= (c t3 0 0 2 1 + c t2 0 0 1 2) / 2
-     where
-       t2 = tetrahedron cube 2
-       t3 = tetrahedron cube 3
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). Repeats
---   'prop_c0120_identity1' with tetrahedrons 4 and 5.
-prop_c0120_identity5 :: Cube -> Bool
-prop_c0120_identity5 cube =
-    c t5 0 1 2 0 ~= (c t5 0 0 2 1 + c t4 0 0 1 2) / 2
-    where
-      t4 = tetrahedron cube 4
-      t5 = tetrahedron cube 5
-
--- -- | Given in Sorokina and Zeilfelder, p. 79, (2.6). Repeats
--- --   'prop_c0120_identity1' with tetrahedrons 5 and 6.
-prop_c0120_identity6 :: Cube -> Bool
-prop_c0120_identity6 cube =
-   c t6 0 1 2 0 ~= (c t6 0 0 2 1 + c t5 0 0 1 2) / 2
-     where
-       t5 = tetrahedron cube 5
-       t6 = tetrahedron cube 6
-
-
--- -- | Given in Sorokina and Zeilfelder, p. 79, (2.6). Repeats
--- --   'prop_c0120_identity1' with tetrahedrons 6 and 7.
-prop_c0120_identity7 :: Cube -> Bool
-prop_c0120_identity7 cube =
-   c t7 0 1 2 0 ~= (c t7 0 0 2 1 + c t6 0 0 1 2) / 2
-     where
-       t6 = tetrahedron cube 6
-       t7 = tetrahedron cube 7
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). See
---   'prop_c0120_identity1'.
-prop_c0210_identity1 :: Cube -> Bool
-prop_c0210_identity1 cube =
-    c t0 0 2 1 0 ~= (c t0 0 1 1 1 + c t3 0 1 1 1) / 2
-      where
-        t0 = tetrahedron cube 0
-        t3 = tetrahedron cube 3
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). See
---   'prop_c0120_identity1'.
-prop_c0300_identity1 :: Cube -> Bool
-prop_c0300_identity1 cube =
-    c t0 0 3 0 0 ~= (c t0 0 2 0 1 + c t3 0 2 1 0) / 2
-      where
-        t0 = tetrahedron cube 0
-        t3 = tetrahedron cube 3
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). See
---   'prop_c0120_identity1'.
-prop_c1110_identity :: Cube -> Bool
-prop_c1110_identity cube =
-    c t0 1 1 1 0 ~= (c t0 1 0 1 1 + c t3 1 0 1 1) / 2
-      where
-        t0 = tetrahedron cube 0
-        t3 = tetrahedron cube 3
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). See
---   'prop_c0120_identity1'.
-prop_c1200_identity1 :: Cube -> Bool
-prop_c1200_identity1 cube =
-    c t0 1 2 0 0 ~= (c t0 1 1 0 1 + c t3 1 1 1 0) / 2
-      where
-        t0 = tetrahedron cube 0
-        t3 = tetrahedron cube 3
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.6). See
---   'prop_c0120_identity1'.
-prop_c2100_identity1 :: Cube -> Bool
-prop_c2100_identity1 cube =
-    c t0 2 1 0 0 ~= (c t0 2 0 0 1 + c t3 2 0 1 0) / 2
-      where
-        t0 = tetrahedron cube 0
-        t3 = tetrahedron cube 3
-
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.7). Note that the
---   third and fourth indices of c-t3 have been switched. This is
---   because we store the triangles oriented such that their volume is
---   positive. If T and T-tilde share \<v0,v1,v2\> and v3,v3-tilde
---   point in opposite directions, one of them has to have negative
---   volume!
-prop_c0102_identity1 :: Cube -> Bool
-prop_c0102_identity1 cube =
-    c t0 0 1 0 2 ~= (c t0 0 0 1 2 + c t1 0 0 2 1) / 2
-      where
-        t0 = tetrahedron cube 0
-        t1 = tetrahedron cube 1
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.7). See
---   'prop_c0102_identity1'.
-prop_c0201_identity1 :: Cube -> Bool
-prop_c0201_identity1 cube =
-    c t0 0 2 0 1 ~= (c t0 0 1 1 1 + c t1 0 1 1 1) / 2
-      where
-        t0 = tetrahedron cube 0
-        t1 = tetrahedron cube 1
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.7). See
---   'prop_c0102_identity1'.
-prop_c0300_identity2 :: Cube -> Bool
-prop_c0300_identity2 cube =
-    c t0 0 3 0 0 ~= (c t0 0 2 1 0 + c t1 0 2 0 1) / 2
-      where
-        t0 = tetrahedron cube 0
-        t1 = tetrahedron cube 1
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.7). See
---   'prop_c0102_identity1'.
-prop_c1101_identity :: Cube -> Bool
-prop_c1101_identity cube =
-    c t0 1 1 0 1 ~= (c t0 1 0 1 1 + c t1 1 0 1 1) / 2
-      where
-        t0 = tetrahedron cube 0
-        t1 = tetrahedron cube 1
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.7). See
---   'prop_c0102_identity1'.
-prop_c1200_identity2 :: Cube -> Bool
-prop_c1200_identity2 cube =
-    c t0 1 2 0 0 ~= (c t0 1 1 1 0 + c t1 1 1 0 1) / 2
-      where
-        t0 = tetrahedron cube 0
-        t1 = tetrahedron cube 1
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.7). See
---   'prop_c0102_identity1'.
-prop_c2100_identity2 :: Cube -> Bool
-prop_c2100_identity2 cube =
-    c t0 2 1 0 0 ~= (c t0 2 0 1 0 + c t1 2 0 0 1) / 2
-      where
-        t0 = tetrahedron cube 0
-        t1 = tetrahedron cube 1
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.8). The third and
---   fourth indices of c-t6 have been switched. This is because we
---   store the triangles oriented such that their volume is
---   positive. If T and T-tilde share \<v0,v1,v2\> and v3,v3-tilde
---   point in opposite directions, one of them has to have negative
---   volume!
-prop_c3000_identity :: Cube -> Bool
-prop_c3000_identity cube =
-    c t0 3 0 0 0 ~= c t0 2 1 0 0 + c t6 2 1 0 0
-                    - ((c t0 2 0 1 0 + c t0 2 0 0 1)/ 2)
-      where
-        t0 = tetrahedron cube 0
-        t6 = tetrahedron cube 6
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.8). See
---   'prop_c3000_identity'.
-prop_c2010_identity :: Cube -> Bool
-prop_c2010_identity cube =
-    c t0 2 0 1 0 ~= c t0 1 1 1 0 + c t6 1 1 0 1
-                    - ((c t0 1 0 2 0 + c t0 1 0 1 1)/ 2)
-      where
-        t0 = tetrahedron cube 0
-        t6 = tetrahedron cube 6
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.8). See
---   'prop_c3000_identity'.
-prop_c2001_identity :: Cube -> Bool
-prop_c2001_identity cube =
-    c t0 2 0 0 1 ~= c t0 1 1 0 1 + c t6 1 1 1 0
-                    - ((c t0 1 0 0 2 + c t0 1 0 1 1)/ 2)
-      where
-        t0 = tetrahedron cube 0
-        t6 = tetrahedron cube 6
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.8). See
---   'prop_c3000_identity'.
-prop_c1020_identity :: Cube -> Bool
-prop_c1020_identity cube =
-    c t0 1 0 2 0 ~= c t0 0 1 2 0 + c t6 0 1 0 2
-                    - ((c t0 0 0 3 0 + c t0 0 0 2 1)/ 2)
-      where
-        t0 = tetrahedron cube 0
-        t6 = tetrahedron cube 6
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.8). See
---   'prop_c3000_identity'.
-prop_c1002_identity :: Cube -> Bool
-prop_c1002_identity cube =
-    c t0 1 0 0 2 ~= c t0 0 1 0 2 + c t6 0 1 2 0
-                    - ((c t0 0 0 0 3 + c t0 0 0 1 2)/ 2)
-      where
-        t0 = tetrahedron cube 0
-        t6 = tetrahedron cube 6
-
-
--- | Given in Sorokina and Zeilfelder, p. 79, (2.8). See
---   'prop_c3000_identity'.
-prop_c1011_identity :: Cube -> Bool
-prop_c1011_identity cube =
-    c t0 1 0 1 1 ~= c t0 0 1 1 1 + c t6 0 1 1 1 -
-                    ((c t0 0 0 1 2 + c t0 0 0 2 1)/ 2)
-      where
-        t0 = tetrahedron cube 0
-        t6 = tetrahedron cube 6
-
-
-
--- | Given in Sorokina and Zeilfelder, p. 78.
-prop_cijk1_identity :: Cube -> Bool
-prop_cijk1_identity cube =
-     and [ c t0 i j k 1 ~=
-                 (c t1 (i+1) j k 0) * ((b0 t0) (v3 t1)) +
-                 (c t1 i (j+1) k 0) * ((b1 t0) (v3 t1)) +
-                 (c t1 i j (k+1) 0) * ((b2 t0) (v3 t1)) +
-                 (c t1 i j k 1) * ((b3 t0) (v3 t1)) | i <- [0..2],
-                                                      j <- [0..2],
-                                                      k <- [0..2],
-                                                      i + j + k == 2]
-      where
-        t0 = tetrahedron cube 0
-        t1 = tetrahedron cube 1
-
-
--- | The function values at the interior should be the same for all
---   tetrahedra.
-prop_interior_values_all_identical :: Cube -> Bool
-prop_interior_values_all_identical cube =
-    all_equal [ eval (Tetrahedron.fv tet) I | tet <- tetrahedra cube ]
-
-
--- | We know what (c t6 2 1 0 0) should be from Sorokina and Zeilfelder, p. 87.
---   This test checks the rotation works as expected.
-prop_c_tilde_2100_rotation_correct :: Cube -> Bool
-prop_c_tilde_2100_rotation_correct cube =
-    expr1 == expr2
-    where
-      t0 = tetrahedron cube 0
-      t6 = tetrahedron cube 6
-
-      -- What gets computed for c2100 of t6.
-      expr1 = eval (Tetrahedron.fv t6) $
-          (3/8)*I +
-          (1/12)*(T + R + L + D) +
-          (1/64)*(FT + FR + FL + FD) +
-          (7/48)*F +
-          (1/48)*B +
-          (1/96)*(RT + LD + LT + RD) +
-          (1/192)*(BT + BR + BL + BD)
-
-      -- What should be computed for c2100 of t6.
-      expr2 = eval (Tetrahedron.fv t0) $
-              (3/8)*I +
-              (1/12)*(F + R + L + B) +
-              (1/64)*(FT + RT + LT + BT) +
-              (7/48)*T +
-              (1/48)*D +
-              (1/96)*(FR + FL + BR + BL) +
-              (1/192)*(FD + RD + LD + BD)
-
-
--- | We know what (c t6 2 1 0 0) should be from Sorokina and
---   Zeilfelder, p. 87.  This test checks the actual value based on
---   the FunctionValues of the cube.
---
---   If 'prop_c_tilde_2100_rotation_correct' passes, then this test is
---   even meaningful!
-prop_c_tilde_2100_correct :: Cube -> Bool
-prop_c_tilde_2100_correct cube =
-    c t6 2 1 0 0 == expected
-    where
-      t0 = tetrahedron cube 0
-      t6 = tetrahedron cube 6
-      fvs = Tetrahedron.fv t0
-      expected = eval fvs $
-                  (3/8)*I +
-                  (1/12)*(F + R + L + B) +
-                  (1/64)*(FT + RT + LT + BT) +
-                  (7/48)*T +
-                  (1/48)*D +
-                  (1/96)*(FR + FL + BR + BL) +
-                  (1/192)*(FD + RD + LD + BD)
-
-
--- Tests to check that the correct edges are incidental.
-prop_t0_shares_edge_with_t1 :: Cube -> Bool
-prop_t0_shares_edge_with_t1 cube =
-    (v1 t0) == (v1 t1) && (v3 t0) == (v2 t1)
-      where
-        t0 = tetrahedron cube 0
-        t1 = tetrahedron cube 1
-
-prop_t0_shares_edge_with_t3 :: Cube -> Bool
-prop_t0_shares_edge_with_t3 cube =
-    (v1 t0) == (v1 t3) && (v2 t0) == (v3 t3)
-      where
-        t0 = tetrahedron cube 0
-        t3 = tetrahedron cube 3
-
-prop_t0_shares_edge_with_t6 :: Cube -> Bool
-prop_t0_shares_edge_with_t6 cube =
-    (v2 t0) == (v3 t6) && (v3 t0) == (v2 t6)
-      where
-        t0 = tetrahedron cube 0
-        t6 = tetrahedron cube 6
-
-prop_t1_shares_edge_with_t2 :: Cube -> Bool
-prop_t1_shares_edge_with_t2 cube =
-    (v1 t1) == (v1 t2) && (v3 t1) == (v2 t2)
-      where
-        t1 = tetrahedron cube 1
-        t2 = tetrahedron cube 2
-
-prop_t1_shares_edge_with_t19 :: Cube -> Bool
-prop_t1_shares_edge_with_t19 cube =
-    (v2 t1) == (v3 t19) && (v3 t1) == (v2 t19)
-      where
-        t1 = tetrahedron cube 1
-        t19 = tetrahedron cube 19
-
-prop_t2_shares_edge_with_t3 :: Cube -> Bool
-prop_t2_shares_edge_with_t3 cube =
-    (v1 t1) == (v1 t2) && (v3 t1) == (v2 t2)
-      where
-        t1 = tetrahedron cube 1
-        t2 = tetrahedron cube 2
-
-prop_t2_shares_edge_with_t12 :: Cube -> Bool
-prop_t2_shares_edge_with_t12 cube =
-    (v2 t2) == (v3 t12) && (v3 t2) == (v2 t12)
-      where
-        t2 = tetrahedron cube 2
-        t12 = tetrahedron cube 12
-
-prop_t3_shares_edge_with_t21 :: Cube -> Bool
-prop_t3_shares_edge_with_t21 cube =
-    (v2 t3) == (v3 t21) && (v3 t3) == (v2 t21)
-      where
-        t3 = tetrahedron cube 3
-        t21 = tetrahedron cube 21
-
-prop_t4_shares_edge_with_t5 :: Cube -> Bool
-prop_t4_shares_edge_with_t5 cube =
-    (v1 t4) == (v1 t5) && (v3 t4) == (v2 t5)
-      where
-        t4 = tetrahedron cube 4
-        t5 = tetrahedron cube 5
-
-prop_t4_shares_edge_with_t7 :: Cube -> Bool
-prop_t4_shares_edge_with_t7 cube =
-    (v1 t4) == (v1 t7) && (v2 t4) == (v3 t7)
-      where
-        t4 = tetrahedron cube 4
-        t7 = tetrahedron cube 7
-
-prop_t4_shares_edge_with_t10 :: Cube -> Bool
-prop_t4_shares_edge_with_t10 cube =
-    (v2 t4) == (v3 t10) && (v3 t4) == (v2 t10)
-      where
-        t4 = tetrahedron cube 4
-        t10 = tetrahedron cube 10
-
-prop_t5_shares_edge_with_t6 :: Cube -> Bool
-prop_t5_shares_edge_with_t6 cube =
-    (v1 t5) == (v1 t6) && (v3 t5) == (v2 t6)
-      where
-        t5 = tetrahedron cube 5
-        t6 = tetrahedron cube 6
-
-prop_t5_shares_edge_with_t16 :: Cube -> Bool
-prop_t5_shares_edge_with_t16 cube =
-    (v2 t5) == (v3 t16) && (v3 t5) == (v2 t16)
-      where
-        t5 = tetrahedron cube 5
-        t16 = tetrahedron cube 16
-
-prop_t6_shares_edge_with_t7 :: Cube -> Bool
-prop_t6_shares_edge_with_t7 cube =
-    (v1 t6) == (v1 t7) && (v3 t6) == (v2 t7)
-      where
-        t6 = tetrahedron cube 6
-        t7 = tetrahedron cube 7
-
-prop_t7_shares_edge_with_t20 :: Cube -> Bool
-prop_t7_shares_edge_with_t20 cube =
-    (v2 t7) == (v3 t20) && (v2 t7) == (v3 t20)
-      where
-        t7 = tetrahedron cube 7
-        t20 = tetrahedron cube 20