Questions about Mathematica's predicate functions.
15
votes
8answers
536 views
How do you check if there are any equal arguments(even sublist) in a list?
I would like to set up a function which has to return True if at least two arguments of a given List are equal.
So if I give {1,4,6,2} to the function it has to ...
17
votes
4answers
510 views
Why does Mathematica claim there is no even prime?
I wonder if this is a bug, or if I'm misunderstanding something:
Exists[n, EvenQ[n] && PrimeQ[n]] // Resolve
(*
==> False
*)
So if I interpret this ...
14
votes
1answer
307 views
_?NumericQ equivalent for lists
A few months ago I got a simple answer (see: 1 ) to the question of how to force numeric evaluation during use of functions such as NMinimize - namely the use of _?NumericQ in the argument list.
I ...
10
votes
1answer
168 views
Why does Assuming[x > 0, TrueQ[x > 0]] return False?
Assuming[x>0,TrueQ[x>0]]
should, as I understand it, test TrueQ[x>0] after assuming ...
9
votes
5answers
796 views
Fastest square number test
What is the fastest possible square number test in Mathematica 7, both for machine size and big integers?
I presume in version 8 the fastest will be a dedicated C LibraryLink function.
5
votes
2answers
189 views
Why is an integer not considered as a real?
Please consider the following:
zeros={0.,0};
data={1, 0., 0};
DeleteCases[data, #]&/@zeros
Head/@zeros
(*{Real, Integer}*)
(*{{1, 0}, {1, 0.}}*)
For my ...
