What if there are two identities?
44100
Prove that identity element is unique
13012
Why can a = b imply 2 = 1?
130620
Identity type between A and B being non-empty implies non-emptiness of A and B?
65260
In how many ways can you select one of the two but not both?
125174
Combinatorial intuition of identity
49855
Need a matrix to seventh power which is the identity but the original is not or the negative identity
33329
Can I make conclusions with two independent samples?
143610
If $f^3=\rm id$ then it is identity function
92273
Found this identity by accident
155679
If union of two theories is not consistent one of them implies a sentence which the other implies opposite of it
13049
"There is/are more than one". What's the difference?
18287
Distinction between equality, logical equivalence and biconditionality.
28925
Can the Identity Map be a repeated composition one other function?
41943
Why is it that when proving trig identities, one must work both sides independently?
148502
Two accepted answers
158600
Are these two statements equivalent?
40478
If $C$ commutes with certain matrices $A$ and $B$, why is $C$ a scalar multiple of the identity?