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Agrawal's conjecture: Popovych

Roman B. Popovych Conjecture.* A stronger version of Agrawal's conjecture, which also considers the congruence (X+2)nXn+2(modn,Xr1)(X+2)^n \equiv X^n + 2 \pmod{n, X^r-1}. If both congruences hold, then nn is either prime or n21(modr)n^2 \equiv 1 \pmod{r}. This variant was propos...

Mathematical statement

Roman B. Popovych Conjecture.* A stronger version of Agrawal's conjecture, which also considers the congruence (X+2)nXn+2(modn,Xr1)(X+2)^n \equiv X^n + 2 \pmod{n, X^r-1}. If both congruences hold, then nn is either prime or n21(modr)n^2 \equiv 1 \pmod{r}. This variant was proposed by Roman B. Popovych in 2018.

Statement source: Wikipedia statement material

Statement terms: CC-BY-SA-4.0

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Statement artifacts, not proofs

These records expose exact Lean propositions and statement-only wrappers. Defining a proposition does not supply a proof of it. A placeholder-bearing target also contains no proof. Elaboration checks syntax and types; it does not certify that a formalization perfectly captures every nuance of the informal problem.

Pinned Lean formulation 1

agrawal_conjecture.variants.popovych

Canonical source
Complete statement target, proof intentionally absentLean 4
theorem agrawal_conjecture.variants.popovych :   (n r : ), n > 1  r > 0  n.gcd r = 1     let R := Polynomial (ZMod n)    let X : R := Polynomial.X    let I : Ideal R := Ideal.span ({X^r - 1} : Set R)    Ideal.Quotient.mk I ((X - 1)^n) = Ideal.Quotient.mk I (X^n - 1)     Ideal.Quotient.mk I ((X + 2)^n) = Ideal.Quotient.mk I (X^n + 2)     (n.Prime  (n^2 : ZMod r) = 1) := by  sorry
Statement source
Formal Conjectures
Lean version
v4.27.0
Placeholder
Present; no proof artifact
Source evidence
Pinned source index
Fidelity review
Community formulation

References