README: rewrite it, it was rather out-of-date

[sage.d.git] / mjo / cone / schur.py

diff --git a/mjo/cone/schur.py b/mjo/cone/schur.py
deleted file mode 100644 (file)
index bea76b6..0000000
--- a/mjo/cone/schur.py
+++ /dev/null
@@ -1,45 +0,0 @@
-"""
-The Schur cone, as described in the "Critical angles..." papers by
-Seeger and Sossa.
-"""
-
-from sage.all import *
-
-def is_pointed(P,Q):
-    newP = Cone([ list(p) for p in P ])
-    newQ = Cone([ list(q) for q in Q ])
-    return newP.intersection(-newQ).is_trivial()
-
-def ext_angles(P,Q):
-    angles = []
-    for p in P:
-        for q in Q:
-            p = vector(SR, p)
-            q = vector(SR, q)
-            p = p/p.norm()
-            q = q/q.norm()
-            angles.append(arccos(p.inner_product(q)))
-
-    return angles
-
-def schur(n):
-    r"""
-    Return the Schur cone in ``n`` dimensions.
-
-    INPUT:
-
-    - ``n`` -- the ambient dimension of the Schur cone and its ambient space.
-
-    OUTPUT:
-
-    A rational closed convex Schur cone of dimension ``n``.
-    """
-
-    hs = []
-    for i in range(1,n):
-        h_i = [0]*n
-        h_i[i-1] = QQ(1)
-        h_i[i] = -QQ(1)
-        hs.append(vector(QQ,n,h_i))
-
-    return Cone(hs)