Chinese remainder theorem and Euler totient function.
23 Puzzles.
Lemmas from continuity
Complement, closure, interior.
Planar graphs.
Edges and vertices of a tree.
Kuratowski-Wagner theorem.
Chebyshev function $\vartheta (x)$.
Dissecting an obtuse triangle into acute triangles.
Equiarea and equiperimeter cut.
$e$ is irrational.
$\pi$ is irrational.
Simple sudoku backtrack algorithm.
Smallest pan-digital prime.
Equivalent statements to PNT.
Chebyshev theorem on primes.
Matrix inverses.
2025-02-23 some integrals relating to Bessel polynomials.
Picard theorem ODE
Fermat point.
← prev 20 | next 20 → 23 Puzzles.
Lemmas from continuity
Complement, closure, interior.
Planar graphs.
Edges and vertices of a tree.
Kuratowski-Wagner theorem.
Chebyshev function $\vartheta (x)$.
Dissecting an obtuse triangle into acute triangles.
Equiarea and equiperimeter cut.
$e$ is irrational.
$\pi$ is irrational.
Simple sudoku backtrack algorithm.
Smallest pan-digital prime.
Equivalent statements to PNT.
Chebyshev theorem on primes.
Matrix inverses.
2025-02-23 some integrals relating to Bessel polynomials.
Picard theorem ODE
Fermat point.