Checking whether a symbolic expression is an equality or inequality?

I have the following code involving symbolic variables and symbolic equations:

a = sym;
eqn1 = a <= 10;
eqn2 = a == 10;

I would like to check (programmatically) that the symbolic object in eqn1 represents an inequality (less than) and eqn2 represents an equality. Is possible to do so?

Thanks!

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/symbolic/mupad_ref/op.html

char(feval(symengine, 'op', eqn1, 1))

The defined relationship operators are _equal, _unequal, _approx, _less, and _leequal . A>B is rewritten as _less(B,A) and A>=B is rewritten as _leequal(B,A)

[Santiago]

Thanks, it works! Small typo: the last argument should be zero.

char(feval(symengine, 'op', eqn1, 0))

[Walter Roberson]

Yes, that makes sense.