Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2024 MCQ for Proceedings of the American Mathematical Society is 0.85.

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Contents of Volume 149, Number 5
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Vanishing of Tor over fiber products: T. H. Freitas, V. H. Jorge Pérez, R. Wiegand and S. Wiegand; Proc. Amer. Math. Soc. 149 (2021), 1817-1825; DOI: https://doi.org/10.1090/proc/14907; Published electronically: March 3, 2021; PDF

Deformation theory of contact Lie algebras as double extensions: M. A. Alvarez, M. C. Rodríguez-Vallarte and G. Salgado; Proc. Amer. Math. Soc. 149 (2021), 1827-1836; DOI: https://doi.org/10.1090/proc/15040; Published electronically: February 26, 2021; PDF

Depth functions of powers of homogeneous ideals: Huy Tài Hà, Hop Dang Nguyen, Ngo Viet Trung and Tran Nam Trung; Proc. Amer. Math. Soc. 149 (2021), 1837-1844; DOI: https://doi.org/10.1090/proc/15083; Published electronically: March 2, 2021; PDF

Springer motives: Jens Niklas Eberhardt; Proc. Amer. Math. Soc. 149 (2021), 1845-1856; DOI: https://doi.org/10.1090/proc/15290; Published electronically: March 1, 2021; PDF

Minimal free resolutions of ideals of minors associated to pairs of matrices: András Cristian Lőrincz; Proc. Amer. Math. Soc. 149 (2021), 1857-1873; DOI: https://doi.org/10.1090/proc/15284; Published electronically: March 2, 2021; PDF

Fourier transforms and Ringel–Hall algebras of valued quivers: Chenyang Ma; Proc. Amer. Math. Soc. 149 (2021), 1875-1887; DOI: https://doi.org/10.1090/proc/15403; Published electronically: February 23, 2021; PDF

Lech’s inequality for the Buchsbaum-Rim multiplicity and mixed multiplicity: Vinh Nguyen and Kelsey Walters; Proc. Amer. Math. Soc. 149 (2021), 1889-1904; DOI: https://doi.org/10.1090/proc/15364; Published electronically: March 1, 2021; PDF

Frequently dense harmonic functions and universal martingales on trees: Evgeny Abakumov, Vassili Nestoridis and Massimo A. Picardello; Proc. Amer. Math. Soc. 149 (2021), 1905-1918; DOI: https://doi.org/10.1090/proc/15355; Published electronically: February 19, 2021; PDF

On the harmonic volume of Fermat curves: Payman Eskandari and V. Kumar Murty; Proc. Amer. Math. Soc. 149 (2021), 1919-1928; DOI: https://doi.org/10.1090/proc/15332; Published electronically: March 3, 2021; PDF

A note on the normal subgroup lattice of ultraproducts of finite quasisimple groups: Jakob Schneider and Andreas Thom; Proc. Amer. Math. Soc. 149 (2021), 1929-1942; DOI: https://doi.org/10.1090/proc/15385; Published electronically: March 2, 2021; PDF

Schubert varieties and finite free resolutions of length three: Steven V Sam and Jerzy Weyman; Proc. Amer. Math. Soc. 149 (2021), 1943-1955; DOI: https://doi.org/10.1090/proc/15347; Published electronically: March 1, 2021; PDF

Strong generators in $\textbf {D}_{\textbf {perf}}(X)$ for schemes with a separator: V. B. Jatoba; Proc. Amer. Math. Soc. 149 (2021), 1957-1971; DOI: https://doi.org/10.1090/proc/15353; Published electronically: February 24, 2021; PDF

On actions of connected Hopf algebras: Ramy Yammine; Proc. Amer. Math. Soc. 149 (2021), 1973-1983; DOI: https://doi.org/10.1090/proc/15377; Published electronically: February 19, 2021; PDF

Remarks on the derivation of finite energy weak solutions to the QHD system: Paolo Antonelli; Proc. Amer. Math. Soc. 149 (2021), 1985-1997; DOI: https://doi.org/10.1090/proc/14502; Published electronically: February 24, 2021; PDF

Orthogonal sums in Kreĭn spaces: James Rovnyak; Proc. Amer. Math. Soc. 149 (2021), 1999-2010; DOI: https://doi.org/10.1090/proc/14718; Published electronically: February 24, 2021; PDF

Blow-up rates for a fractional heat equation: R. Ferreira and A. de Pablo; Proc. Amer. Math. Soc. 149 (2021), 2011-2018; DOI: https://doi.org/10.1090/proc/15165; Published electronically: March 2, 2021; PDF

Automatic real analyticity and a regal proof of a commutative multivariate Löwner theorem: J. E. Pascoe and Ryan Tully-Doyle; Proc. Amer. Math. Soc. 149 (2021), 2019-2024; DOI: https://doi.org/10.1090/proc/15255; Published electronically: March 1, 2021; PDF

A local representation formula for quaternionic slice regular functions: Graziano Gentili and Caterina Stoppato; Proc. Amer. Math. Soc. 149 (2021), 2025-2034; DOI: https://doi.org/10.1090/proc/15339; Published electronically: March 2, 2021; PDF

Areas spanned by point configurations in the plane: Alex McDonald; Proc. Amer. Math. Soc. 149 (2021), 2035-2049; DOI: https://doi.org/10.1090/proc/15348; Published electronically: February 24, 2021; PDF

A note on compact Kähler manifolds with quasi-negative holomorphic sectional curvature: Wei Xia; Proc. Amer. Math. Soc. 149 (2021), 2051-2055; DOI: https://doi.org/10.1090/proc/15336; Published electronically: March 2, 2021; PDF

Further improvements of Askey-Steinig’s inequalities for finite sums involving sine and cosine: Horst Alzer and Man Kam Kwong; Proc. Amer. Math. Soc. 149 (2021), 2057-2065; DOI: https://doi.org/10.1090/proc/15337; Published electronically: March 2, 2021; PDF

Non-local in time telegraph equations and very slowly growing variances: Francisco Alegría and Juan C. Pozo; Proc. Amer. Math. Soc. 149 (2021), 2067-2080; DOI: https://doi.org/10.1090/proc/15390; Published electronically: February 24, 2021; PDF

Non-homogeneous extensions of Cantor minimal systems: Robin J. Deeley, Ian F. Putnam and Karen R. Strung; Proc. Amer. Math. Soc. 149 (2021), 2081-2089; DOI: https://doi.org/10.1090/proc/15342; Published electronically: February 24, 2021; PDF

Semi-waves with $\Lambda$-shaped free boundary for nonlinear Stefan problems: Existence: Yihong Du, Changfeng Gui, Kelei Wang and Maolin Zhou; Proc. Amer. Math. Soc. 149 (2021), 2091-2104; DOI: https://doi.org/10.1090/proc/15346; Published electronically: March 2, 2021; PDF

Uniform Lipschitz continuity of the isoperimetric profile of compact surfaces under normalized Ricci flow: Yizhong Zheng; Proc. Amer. Math. Soc. 149 (2021), 2105-2119; DOI: https://doi.org/10.1090/proc/15367; Published electronically: February 24, 2021; PDF

Riesz bases of exponentials and the Bohr topology: Carlos Cabrelli, Kathryn E. Hare and Ursula Molter; Proc. Amer. Math. Soc. 149 (2021), 2121-2131; DOI: https://doi.org/10.1090/proc/15395; Published electronically: February 23, 2021; PDF

Multidimensional analogues of refined Bohr’s inequality: Ming-Sheng Liu and Saminathan Ponnusamy; Proc. Amer. Math. Soc. 149 (2021), 2133-2146; DOI: https://doi.org/10.1090/proc/15371; Published electronically: February 24, 2021; PDF

The positive polynomial Schur property in Banach lattices: Geraldo Botelho and José Lucas P. Luiz; Proc. Amer. Math. Soc. 149 (2021), 2147-2160; DOI: https://doi.org/10.1090/proc/15392; Published electronically: February 24, 2021; PDF

Superconvexity of the heat kernel on hyperbolic space with applications to mean curvature flow: Yongzhe Zhang; Proc. Amer. Math. Soc. 149 (2021), 2161-2166; DOI: https://doi.org/10.1090/proc/15379; Published electronically: March 2, 2021; PDF

Estimates for sums of eigenvalues of the free plate with nonzero Poisson’s ratio: Shan Li and Jing Mao; Proc. Amer. Math. Soc. 149 (2021), 2167-2177; DOI: https://doi.org/10.1090/proc/15444; Published electronically: February 24, 2021; PDF

Brake orbits of super-quadratic Hamiltonian systems: Jiamin Xing, Xue Yang and Yong Li; Proc. Amer. Math. Soc. 149 (2021), 2179-2185; DOI: https://doi.org/10.1090/proc/15375; Published electronically: March 2, 2021; PDF

The isoperimetric problem in the 2-dimensional Finsler space forms with $k=0$. II: Mengqing Zhan and Linfeng Zhou; Proc. Amer. Math. Soc. 149 (2021), 2187-2198; DOI: https://doi.org/10.1090/proc/14959; Published electronically: March 2, 2021; PDF

Enlargeable metrics on nonspin manifolds: Simone Cecchini and Thomas Schick; Proc. Amer. Math. Soc. 149 (2021), 2199-2211; DOI: https://doi.org/10.1090/proc/14706; Published electronically: February 24, 2021; PDF

Hyperbolic metrics on open subsets of Ptolemaic spaces with sharp parameter bounds: Neil N. Katz; Proc. Amer. Math. Soc. 149 (2021), 2213-2220; DOI: https://doi.org/10.1090/proc/15288; Published electronically: March 2, 2021; PDF

Expansions of the real field by discrete subgroups of $\operatorname {Gl}_n(\mathbb {C})$: Philipp Hieronymi, Erik Walsberg and Samantha Xu; Proc. Amer. Math. Soc. 149 (2021), 2221-2233; DOI: https://doi.org/10.1090/proc/15382; Published electronically: March 1, 2021; PDF

Remarks on a fractional-time stochastic equation: Mohammud Foondun; Proc. Amer. Math. Soc. 149 (2021), 2235-2247; DOI: https://doi.org/10.1090/proc/14644; Published electronically: March 2, 2021; PDF

An algebraic characterization of $k$–colorability: Ramón Flores, Delaram Kahrobaei and Thomas Koberda; Proc. Amer. Math. Soc. 149 (2021), 2249-2255; DOI: https://doi.org/10.1090/proc/15391; Published electronically: February 24, 2021; PDF

On the realization of symplectic algebras and rational homotopy types by closed symplectic manifolds: Aleksandar Milivojević; Proc. Amer. Math. Soc. 149 (2021), 2257-2263; DOI: https://doi.org/10.1090/proc/15397; Published electronically: March 2, 2021; PDF