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Examples of common false beliefs in mathematics

Which journals publish expository work?

Important formulas in combinatorics

Nontrivial question about Fibonacci numbers?

Citing exercises in an article

Does iterating a certain function related to the sums of divisors eventually always result in a prime value?

Smallest permutation representation of a finite group?

Is every finite group the outer automorphism group of a finite group?

For a continuous function $f:\mathbb{R}^{+}\to\mathbb{R}^{+}$ does $(f(x)-f(y)) (f(\frac{x+y}{2}) - f(\sqrt{xy}))=0$ imply that $f$ is constant?

Constants for Rolle's Theorem applied to polynomials

A question on the prime divisors of p-1

Groups with all normal subgroups characteristic

Origin of group theory problem (bound on number of Sylow subgroups)

On the number of consecutive divisors of an integer

Inconsistencies in MathSciNet citation database

An abstract zero-sum problem

Non-trivial consequences of Baer's theorem and Lucchini's theorem in subnormality theory

Counting subspaces

Finite groups with centerless quotients

Groups with a unique composition series

On the existence of a direct summand containing a fixed subgroup

Conditions for a finite group to be isomorphic to its automorphism group

Degree of commutativity of finite groups and subgroups

On the average number of subgroups per conjugacy class

abelian and nonabelian parts of Aut($\widehat{F_2}$)

Reference request

Abelian subgroups of maximum order in $p$-Groups

Presentation for a group with an abelian subgroup of index 2