Error in false statement

creyesm1992
61 ●2 ●4 ●11

Hello

I write in SAGE the following

p=0+0*I
q=1/2+1/2*I
r=3/4+1/3*I
(real(p)==real(q))==false

and it returns "false", but it is true because 0 is not equal to 1/2. Why?

1 Answer

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The operation

real(p) == real(q)

creates an "inequality". As you can check, the output prints as

>> real(p) == real(q)
0 == (1/2)

You know that the above is false but it is not automatically evaluated within Sage. If you want to force the evaluation you need to run

>>> bool(real(p) == real(q))
False

thank you very much :-) !!!!!!!!!!!!!!!!!

creyesm1992 ( 2019-03-03 18:09:16 +0100 )edit

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Asked: 2019-03-03 17:10:55 +0100

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Last updated: Mar 03 '19