I am trying to learn basic Sage functionality and need a bit of
coaching. Here is one example that I have not been able to figure
out. This is all being done within a Notebook.
x,y = var('x, y');
A = x+y == 3;
bool(A.substitute(x=1,y=2))
returns "True", but
x,y = var('x, y');
A = x+y == 3;
if bool(A.substitute(x=1,y=2)): print "Yes" else: print "No"
gives me an error message. So does
x,y = var('x, y');
A = x+y == 3;
if A.substitute(x=1,y=2): print "Yes" else: print "No"
so... what is the right way to get this conditional to function?
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