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15
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Find the mistake: $A=\emptyset\land B=\emptyset\leftrightarrow A\times B=\emptyset$

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#elementary-set-theory #first-order-logic #quantifiers #fake-proofs
46
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Grandi's series manipulation allowing me to prove 1 = 0?

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#sequences-and-series #solution-verification #infinity #fake-proofs
336
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Compactness theorem in modal logic

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#logic #proof-writing #compactness #fake-proofs #modal-logic
261
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Invertibility of elements in $A[x]$ with coefficients in the Jacobson radical

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#commutative-algebra #ideals #inverse #radicals #fake-proofs
44
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Fake Proof Regarding Factorization of Binomial Coefficients

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#combinatorics #binomial-coefficients #fake-proofs
61
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Why shift operator is not homotopic to 1 ($K_1$-approach)?

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#operator-algebras #fake-proofs #k-theory
230
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Regular conditional probability on Polish space and absolute continuity

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#probability-theory #measure-theory #conditional-expectation #fake-proofs #absolute-continuity
66
Views

Where is the error? Application of FTC

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#calculus #integration #derivatives #solution-verification #fake-proofs
76
Views

$\int_0^x g(x-a)f(a)da=\int_0^x f(a)da$ - Please help to explain the error

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#integration #convolution #fake-proofs
116
Views

Calculus proof: $0=1$ What is my mistake?

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#calculus #solution-verification #fake-proofs
84
Views

How is it possible that if $A \implies B $ is true then $ \lnot ( \lnot B \implies A )$ can be false?

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#logic #solution-verification #propositional-calculus #fake-proofs
488
Views

Find the flaw in this proof that $1$ is the greatest natural number

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#proof-writing #solution-verification #fake-proofs #natural-numbers
99
Views

What is wrong with this proof that every ideal whose radical is prime is a primary ideal?

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#abstract-algebra #commutative-algebra #solution-verification #ideals #fake-proofs
44
Views

Factoring cos, and other trig functions

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#fake-proofs
215
Views

What is wrong with this proof that P≠NP?

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#proof-explanation #solution-verification #fake-proofs

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