Inspired by this ask.sagemath question
<https://ask.sagemath.org/question/77986/with-symbolics-is-doing-unwanted-boolean-comparison/>
:
sage: V=vector(var("v", n=2)) sage: W=vector(var("w", n=2)) sage: V==W
False
This is expected from a (Python) programmer’s point of view, but the
mathematician could expect something like :
sage: from _operator import eq sage: vector(map(eq, V, W)) (v0 == w0, v1 ==
w1)
Similarly,
sage: A=matrix(var("a", n=4), nrows=2) sage: B=matrix(var("b", n=4),
nrows=2) sage: A==B False
where
sage: matrix(map(lambda u, v:map(eq, u, v), A, B)) [a0 == b0 a1 == b1] [a2
== b2 a3 == b3]
could be expected.
Are there (good or bad) reasons not to implement such vector/matrix
equalities ?
​
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