Hasil untuk "math.LO"

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CrossRef Open Access 2025
Weak stability conditions as limits of Bridgeland stability conditions

Tristan C. Collins, Jason Lo, Yun Shi et al.

Abstract In this article, we give a definition of weak stability condition on a triangulated category. The difference between our definition and existing definitions is that we allow objects in the kernel to have non-maximal phases. We then construct four types of weak stability conditions that naturally occur on Weierstraß ellitpic surfaces as limites of Bridgeland stability conditions.

DOAJ Open Access 2011
Decidable Expansions of Labelled Linear Orderings

Alexis Bes, Alexander Rabinovich

Consider a linear ordering equipped with a finite sequence of monadic predicates. If the ordering contains an interval of order type \omega or -\omega, and the monadic second-order theory of the combined structure is decidable, there exists a non-trivial expansion by a further monadic predicate that is still decidable.

Logic, Electronic computers. Computer science
DOAJ Open Access 2011
Co-c.e. spheres and cells in computable metric spaces

Zvonko Iljazovic

We investigate conditions under which a co-computably enumerable set in a computable metric space is computable. Using higher-dimensional chains and spherical chains we prove that in each computable metric space which is locally computable each co-computably enumerable sphere is computable and each co-c.e. cell with co-c.e. boundary sphere is computable.

Logic, Electronic computers. Computer science
CrossRef Open Access 1991
Ask Marilyn: the mathematical controversy in Parade Magazine

Anthony Lo Bello

Marilyn vos Savant is listed in the Guinnes Book of World Records Hall of Fame as the human being with the highest IQ; she makes herself useful by answering questions in her column Ask Marilyn , which appears, for example, in Parade Magazine, a publication inserted into the Sunday editions of several American newspapers.

CrossRef 2010
Math by the Month: Sweet play

Shuk-kwan S. Leung, Jane-Jane Lo

As part of her holiday preparations, Cathy decorates sugar cubes. Cathy's aunt, Ms. Betty, runs a bakery and likes to think of ways to make her store more attractive, especially for holidays. She enjoys cutting, arranging, and designing seasonal displays with her famous brownies almost as much as she enjoys baking them. And everyone loves the different sizes of Ms. Kate's chocolate sticks.

CrossRef 2009
Math by the Month: Comparing Sizes

Dana Cox, Jane-Jane Lo

This month's problems are all about measurements related to sizes in the world, such as gigantic candy bars, signs, and animals. The letters on the famous Hollywood sign are 50 feet tall. The wooden Trojan horse was so big that a small army of soldiers could hide inside.

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