Strange event when evaluating 2D Sage Code

Question

After installing sage on my Macbook Pro (10.6.8), I tried the following code, which worked.

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Then I tried:

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Yikes! What happened? Any thoughts?

D.

score 2 · Answer 1 · answered Mar 16 '14 at 01:34

2

You redefined x.

P = polygon([[1,2],[5,6],[5,0]])
Q = polygon([(-x,y) for x,y in P[0]])
print x

yields 5.0. That's why var('x') worked, it redefined x back.

answered Mar 16 '14 at 01:34

kcrisman

score 0 · Answer 2 · answered Mar 16 '14 at 01:16

0

Found the answer, but not sure why.

enter image description here

answered Mar 16 '14 at 01:16

David

2 Answers2