Results 91 to 100 of about 15,709 (204)

Realism and the point at infinity: The end of the line? [PDF]

open access: yesSynthese, 2023
Parkinson-Coombs O, Núñez R.
europepmc   +1 more source

A topological proof of the modified Euler characteristic based on the orbifold concept. [PDF]

open access: yesActa Crystallogr A Found Adv, 2021
Naskręcki B, Dauter Z, Jaskolski M.
europepmc   +1 more source

M-theory, black holes and cosmology. [PDF]

open access: yesProc Math Phys Eng Sci, 2021
Kallosh R.
europepmc   +1 more source

Historical development of the anesthetic machine: from Morton to the integration of the mechanical ventilator. [PDF]

open access: yesBraz J Anesthesiol, 2021
Romero-Ávila P   +2 more
europepmc   +1 more source

Word posets, complexity, and Coxeter groups

open access: yes, 2011
A monoid $M$ generated by a set $S$ of symbols can be described as the set of equivalence classes of finite words in $S$ under some relations that specify when some contiguous sequence of symbols can be replaced by another. If $a,b\in S$, a relation of the form $ab=ba$ is said to be a \emph{commutation relation}.
openaire   +2 more sources

Combinatorics of subword complexes for finite type Coxeter systems

open access: yes, 2023
Unterwortkomplexe (Uwk) für Coxeter-Systeme endlichen Typs sind abstrakte Simplizialkomplexe, induziert durch reduzierte Wörter eines Elements in der assoziierten Gruppe, die in einem Wort Q, geschrieben in den einfachen Erzeugern des Systems, vorkommen. Diese Dissertation umfasst 5 Kapitel.
openaire   +2 more sources

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