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Pietro Paparella

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matrices

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5 posts edited

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135 votes cast

18 Questions

Votes Activity Newest Views

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Ethics questions concerning a referee assignment

Nov 2 '19 at 15:43 Pietro Paparella 1,533

votes

answer

857

views

Journal losing indexing services

soft-question journals mathscinet

Mar 25 '19 at 2:00 Pietro Paparella 1,533

votes

answers

469

views

Is every powerful number the sum of a powerful number and a prime?

nt.number-theory goldbach-type-problems powerful-numbers

Dec 27 at 5:11 Pietro Paparella 1,533

votes

answers

677

views

Polynomials that preserve nonnegativity

ag.algebraic-geometry reference-request polynomials positivity semialgebraic-geometry

Oct 24 at 0:19 Pietro Paparella 1,533

votes

answer

898

views

Treating citation numbers as objects [duplicate]

soft-question mathematical-writing

Oct 5 at 17:24 David White 20.6k

votes

answers

613

views

Primitive integral solutions to $x^2+y^3=z^2$

nt.number-theory diophantine-equations

Oct 17 at 21:38 YCor 42.6k

votes

answers

540

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Locus of roots of all convex combinations of two monic polynomials

ag.algebraic-geometry cv.complex-variables polynomials zeroes

Jan 31 '18 at 19:31 Pietro Paparella 1,533

votes

answers

450

views

Expected value of the spectral radius of a random nonnegative matrix

pr.probability random-matrices nonnegative-matrices

Jun 22 '17 at 2:21 ofer zeitouni 6,694

votes

answers

163

views

Frobenius normal form of a doubly stochastic matrix

matrices matrix-theory nonnegative-matrices directed-graphs stochastic-matrices

Jun 28 '19 at 23:07 Pietro Paparella 1,533

votes

answers

views

Rank of binary matrix related to the number of positive squarefree integers less than $n$

nt.number-theory reference-request matrices square-free

Jul 6 '18 at 0:08 Pietro Paparella 1,533

votes

answer

views

Polytopes and polyhedral cones in complex Euclidean space

discrete-geometry convex-polytopes polyhedra

Jul 19 '19 at 22:26 Pietro Paparella 1,533

votes

answer

298

views

Is it faster to compute eigenvalues or coefficients of characteristic polynomials?

reference-request matrices na.numerical-analysis eigenvalues numerical-linear-algebra

Jul 19 '19 at 21:47 Federico Poloni 16.6k

votes

answer

views

Additivity of the Field of Values

matrix-analysis matrix-theory

Jul 2 '19 at 16:08 Pietro Paparella 1,533

vote

answer

163

views

Locus of roots of all convex combinations of two monic polynomials, II

ag.algebraic-geometry cv.complex-variables polynomials zeroes

Jun 26 at 23:14 Pietro Paparella 1,533

vote

answers

229

views

Complex semi-algebraic sets

reference-request semialgebraic-geometry

Aug 11 '19 at 18:44 Todd Trimble♦ 48.7k

vote

answers

265

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Interlacing Suleĭmanova spectra

linear-algebra ca.classical-analysis-and-odes polynomials sp.spectral-theory nonnegative-matrices

Jun 5 '17 at 22:01 Pietro Paparella 1,533

votes

answer

122

views

Polynomials $p$ such that $p$ and $p'$ preserve nonnegative numbers

reference-request polynomials positivity

Mar 21 '18 at 17:44 Pietro Paparella 1,533

-1

votes

answers

158

views

Formula for the entry of a matrix power

reference-request matrices

Oct 7 at 22:07 Pietro Paparella 1,533

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18 Questions

Ethics questions concerning a referee assignment

Journal losing indexing services

Is every powerful number the sum of a powerful number and a prime?

Polynomials that preserve nonnegativity

Treating citation numbers as objects [duplicate]

Primitive integral solutions to $x^2+y^3=z^2$

Locus of roots of all convex combinations of two monic polynomials

Expected value of the spectral radius of a random nonnegative matrix

Frobenius normal form of a doubly stochastic matrix

Rank of binary matrix related to the number of positive squarefree integers less than $n$

Polytopes and polyhedral cones in complex Euclidean space

Is it faster to compute eigenvalues or coefficients of characteristic polynomials?

Additivity of the Field of Values

Locus of roots of all convex combinations of two monic polynomials, II

Complex semi-algebraic sets

Interlacing Suleĭmanova spectra

Polynomials $p$ such that $p$ and $p'$ preserve nonnegative numbers

Formula for the entry of a matrix power