Need to prove or disprove an alternative group definition.
96910
Prove the following alternative group definition.
158490
Prove that $G^{op} \cong G$ when $G^{op}$ is the opposite group of G
113925
Normal Subgroup Counterexample
124710
Why is the identity element included in the definition of a group?
66711
Neutral alternative to "deny" to mean "assert the untruth [of a claim]"
79452
How to prove that it is a group?
120517
Is it possible to prove that a particular statement cannot be disproved without creating a contradiction?
118022
Show that a group of order $180$ is not simple.
87992
A proposition is non-falsifiable. So what?
26572
Does the Symmetric difference operator define a group on the powerset of a set?
85540
Prove or Disprove the Existence of Solutions...
109685
An invalid argument, the conclusion of which is a tautology
88188
Explain proof by contradiction.
113344
How do we prove that something is unprovable?
155657
argument about fallacy of diff(M) being a gauge group for general relativity
83981
How to prove those "curious identities"?
114522
Prove that identity is unique in a group