Vol. 12, No. 4, 2019

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ISSN: 1944-4184 (e-only)
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Vol. 12, No. 4, 2019

DOI: 10.2140/involve.2019.12-4
Euler's formula for the zeta function at the positive even integers
541–548

Samyukta Krishnamurthy and Micah B. Milinovich

Descents and des-Wilf equivalence of permutations avoiding certain nonclassical patterns
549–563

Caden Bielawa, Robert Davis, Daniel Greeson and Qinhan Zhou

The classification of involutions and symmetric spaces of modular groups
565–583

Marc Besson and Jennifer Schaefer

When is $a^{n} + 1$ the sum of two squares?
585–605

Greg Dresden, Kylie Hess, Saimon Islam, Jeremy Rouse, Aaron Schmitt, Emily Stamm, Terrin Warren and Pan Yue

Irreducible character restrictions to maximal subgroups of low-rank classical groups of types $B$ and $C$
607–631

Kempton Albee, Mike Barnes, Aaron Parker, Eric Roon and A. A. Schaeffer Fry

Prime labelings of infinite graphs
633–646

Matthew Kenigsberg and Oscar Levin

Positional strategies in games of best choice
647–658

Aaron Fowlkes and Brant Jones

Graphs with at most two trees in a forest-building process
659–670

Steve Butler, Misa Hamanaka and Marie Hardt

Log-concavity of Hölder means and an application to geometric inequalities
671–686

Aurel I. Stan and Sergio D. Zapeta-Tzul

Applying prospect theory to multiattribute problems with independence assumptions
687–711

Jack Stanley and Frank P. A. Coolen

On weight-one solvable configurations of the Lights Out puzzle
713–720

Yuki Hayata and Masakazu Yamagishi