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Question: subs command bug?!

Question:subs command bug?!

itsme 769 Maple
substitution
February 09 2012
0

Hi:

Consider this trivial (very contrived) example:

restart:

a:=lambda+3;
b:=Vector([lambda-2, lambda+23]);

subs(lambda=1, a); #works as expected

subs(lambda=1, b); #works as expected

 
assume(lambda, real);  #seems like this causes a problem
subs(lambda=1, a);  #works as expected

subs(lambda=1, b);  #This substitution does NOT work - lambda stays as 'lambda'

I am using maple 15 on 64bit linux. Can anyone reproduce it? Is this a bug or is there a viable explanation for this behavior.

thanks
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