New posts in fake-proofs

Failure of an elementary 'proof' of Fermat's Last Theorem?

number-theory proof-verification diophantine-equations fake-proofs

Where did I go wrong with my odd proof that $\frac{3dx}{3x} = \frac{5dx}{5x} \iff 3=5$?

calculus fake-proofs

I can't remember a fallacious proof involving integrals and trigonometric identities.

calculus integration trigonometry fake-proofs constants

What is wrong with this putative proof?

fake-proofs

Nonsense from combining two iffs ($\iff$)

logic proof-explanation fake-proofs

How to find the error in a proof? (that $1=0$)

recreational-mathematics fake-proofs

Where am I wrong that I can prove every subgroup is normal?

group-theory solution-verification group-actions normal-subgroups fake-proofs

Fake Proof for Dimension of $SO(n)$ (rotations)?

solution-verification lie-groups rotations fake-proofs orthogonal-matrices

What's wrong with this "proof" that Gödel's first incompleteness theorem is wrong?

fake-proofs incompleteness

What's going on with this 5-line proof of Fermat's Last Theorem? [duplicate]

proof-explanation philosophy fake-proofs

A contradiction involving exponents

complex-numbers exponentiation fake-proofs

Proof that every field is perfect?

abstract-algebra field-theory extension-field fake-proofs

What's wrong with this proof that commutativity is implied by the other field axioms?

abstract-algebra arithmetic fake-proofs

There are no bearded men in the world - What goes wrong in this proof?

induction fake-proofs

Funny thing. Multiplying both the sides by 0?

trigonometry fake-proofs

An outrageous way to derive a Laurent series: why does this work?

complex-analysis riemann-zeta fake-proofs laurent-series

Two paradoxes: $\pi = 2$ and $\sqrt 2 = 2$ [duplicate]

geometry infinity fake-proofs paradoxes

What mistakes, if any, were made in Numberphile's proof that $1+2+3+\cdots=-1/12$?

education fake-proofs

Why isn't $e^{2\pi xi}=1$ true for all $x$?

complex-numbers exponentiation fake-proofs

What is the flaw in this proof that all triangles are isosceles?

geometry recreational-mathematics triangles fake-proofs