Results 141 to 150 of about 111,899 (306)
Commutativity theorems for rings with constraints on commutators [PDF]
International Journal of Mathematics and Mathematical Sciences, 1991 In this paper, we generalize some well‐known commutativity theorems for associative rings as follows: Let n > 1, m, s, and t be fixed non‐negative integers such that s ≠ m − 1, or t ≠ n − 1, and let R be a ring with unity 1 satisfying the polynomial identity ys[xn, y] = [x, ym]xt for all y ∈ R.
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, 2015 In this paper, we establish a weighted sharp maximal function estimate for the commutator associated with the singular integral operator satisfying a variant of Hörmander’s condition.
Xiao ha Zhou
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Philosophical Perspectives, EarlyView.ABSTRACT We can use “reason,” with its normative sense, as both a count noun (“there is a reason for her to Φ”) and a mass noun (“there is plenty of reason for her to Φ”). How are the count and mass senses of “reason” related? Daniel Fogal argues that the mass sense is fundamental: Just as lights are merely those things that give light and anxieties ...
Eliot Watkins
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Where Mathematical Symbols Come From
Topics in Cognitive Science, EarlyView.Abstract There is a sense in which the symbols used in mathematical expressions and formulas are arbitrary. After all, arithmetic would be no different if we would replace the symbols ‘+$+$’ or ‘8’ by different symbols. Nevertheless, the shape of many mathematical symbols is in fact well motivated in practice.
Dirk Schlimm
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Nontautological cycles on moduli spaces of smooth pointed curves
Bulletin of the London Mathematical Society, EarlyView.Abstract In recent work by Arena, Canning, Clader, Haburcak, Li, Mok, and Tamborini, it was proven that for infinitely many values of g$g$ and n$n$, there exist nontautological algebraic cohomology classes on the moduli space Mg,n$\mathcal {M}_{g,n}$ of smooth genus g$g$, n$n$‐pointed curves.
Dario Faro, Carolina Tamborini
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A Quasi-Commutative Ring That is Not Neo-Commutative [PDF]
Proceedings of the American Mathematical Society, 1994 An example of a ring that is quasi-commutative but not neo-commutative is given.
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A finite‐dimensional counterexample for Arveson's hyperrigidity conjecture
Bulletin of the London Mathematical Society, EarlyView.Abstract We construct an operator system generated by four operators that is not hyperrigid, although all restrictions of irreducible representations have the unique extension property.
Marcel Scherer
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Proceedings of the American Mathematical Society, 1992 This paper deals with minimizing | | B − ( A X − X A ) | | p ||B - (AX - XA)|{|_p} , where A A and B B
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Exponential actions defined by vector configurations, Gale duality, and moment‐angle manifolds
Bulletin of the London Mathematical Society, EarlyView.Abstract Exponential actions defined by vector configurations provide a universal framework for several constructions of holomorphic dynamics, non‐Kähler complex geometry, toric geometry and topology. These include leaf spaces of holomorphic foliations, intersections of real and Hermitian quadrics, the quotient construction of simplicial toric ...
Taras Panov
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On the universal pairing for 2‐complexes
Bulletin of the London Mathematical Society, EarlyView.Abstract The universal pairing for manifolds was defined and shown to lack positivity in dimension 4 in [Freedman, Kitaev, Nayak, Slingerland, Walker, and Wang, J. Geom. Topol. 9 (2005), 2303–2317]. We prove an analogous result for 2‐complexes, and show that the universal pairing does not detect the difference between simple homotopy equivalence and 3 ...
Mikhail Khovanov +2 more
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