Results 61 to 70 of about 196,827 (283)

Galleries and q-analogs in combinatorial representation theory [PDF]

, 2006
Schur functions and their q-analogs constitute an interesting branch of combinatorial representation theory. For Schur functions one knows several combinatorial formulas regarding their expansion in terms of monomial symmetric functions, their structure ...
Schwer, Christoph
core  

Peak reduction technique in commutative algebra

, 1999
The "peak reduction" method is a powerful combinatorial technique with applications in many different areas of mathematics as well as theoretical computer science.
D Wright, H Nagao, IR Shafarevich, J Mckay, M Suzuki, M.G.Zaidenberg, M.G., Lin, V.Ya, PM Cohn, R Lyndon, SS Abhyankar, V Shpilrain, W Adams, W Dicks   +11 more
core   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Combinatorial Formulas for Macdonald and Hall-Littlewood Polynomials [PDF]

Discrete Mathematics & Theoretical Computer Science, 2009
A breakthrough in the theory of (type $A$) Macdonald polynomials is due to Haglund, Haiman and Loehr, who exhibited a combinatorial formula for these polynomials in terms of fillings of Young diagrams.
Cristian Lenart
doaj   +1 more source

Galilean quantum gravity with cosmological constant and the extended q-Heisenberg algebra

, 2010
We define a theory of Galilean gravity in 2+1 dimensions with cosmological constant as a Chern-Simons gauge theory of the doubly-extended Newton-Hooke group, extending our previous study of classical and quantum gravity in 2+1 dimensions in the Galilean ...
A Ballesteros, A Ballesteros, A Ballesteros, AY Alekseev, AY Alekseev, AY Alekseev, B. J. Schroers, BJ Schroers, C Duval, C Gomez, C Meusburger, C Meusburger, C Meusburger, C Meusburger, C Meusburger, CR Nappi, E Buffenoir, E Celeghini, E Joung, FA Bais, FA Bais, G Papageorgiou, G. Papageorgiou, GW Gibbons, H Bacry, J Lukierski, JC Perez Bueno, JM Figueroa-O’Farrill, L Freidel, M Bañados, M Daszkiewicz, MA Semenov-Tian-Shansky, MF Atiyah, PA Horvathy, PD Alvarez, R Jackiw, S Majid, S Majid, SP Martin, V Chari, V Hussin, VV Fock, Y Tian   +42 more
core   +1 more source

pH‐mediated activation of the lysosomal arginine sensor SLC38A9

FEBS Letters, EarlyView.
Cells monitor nutrient levels via the lysosomal transporter SLC38A9 to activate the mechanistic target of rapamycin complex 1 (mTORC1). This study reveals that SLC38A9 function is regulated by pH. We identified histidine 544 as a critical pH sensor that undergoes conformational changes to control amino acid efflux from lysosomes; therefore, it ...
Xuelang Mu, Ampon Sae Her, Tamir Gonen
wiley   +1 more source

Hecke group algebras as degenerate affine Hecke algebras [PDF]

Discrete Mathematics & Theoretical Computer Science, 2008
The Hecke group algebra $\operatorname{H} \mathring{W}$ of a finite Coxeter group $\mathring{W}$, as introduced by the first and last author, is obtained from $\mathring{W}$ by gluing appropriately its $0$-Hecke algebra and its group algebra.
Florent Hivert, Anne Schilling, Nicolas M. Thiéry   +2 more
doaj   +1 more source

The Discrete Fundamental Group of the Associahedron, and the Exchange Module

, 2013
The associahedron is an object that has been well studied and has numerous applications, particularly in the theory of operads, the study of non-crossing partitions, lattice theory and more recently in the study of cluster algebras.
CHRISTOPHER SEVERS, HÉLÈNE BARCELO, JACOB A. WHITE, Malle G., Postnikov A., Tamari D.   +5 more
core   +1 more source

Transcriptional network analysis of PTEN‐protein‐deficient prostate tumors reveals robust stromal reprogramming and signs of senescent paracrine communication

Molecular Oncology, EarlyView.
Combining PTEN protein assessment and transcriptomic profiling of prostate tumors, we uncovered a network enriched in senescence and extracellular matrix (ECM) programs associated with PTEN loss and conserved in a mouse model. We show that PTEN‐deficient cells trigger paracrine remodeling of the surrounding stroma and this information could help ...
Ivana Rondon‐Lorefice, Jose I. Lopez, Aitziber Ugalde‐Olano, Maite Zufiaurre, Ianire Astobiza, Natalia Martin‐Martin, Laura Bozal‐Basterra, Saioa Garcia‐Longarte, Amaia Zabala‐Letona, Sofia Rey, Aida Santos‐Martin, Miguel Unda, Ana Loizaga‐Iriarte, Mariona Graupera, Paolo Nuciforo, Arkaitz Carracedo, Isabel Mendizabal   +16 more
wiley   +1 more source

Monoids of O-type, subword reversing, and ordered groups [PDF]

, 2012
We describe a simple scheme for constructing finitely generated monoids in which left-divisibility is a linear ordering and for practically investigating these monoids.
Dehornoy, Patrick
core   +2 more sources