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Derived category of weak chain U -complexes. [PDF]

open access: yesHeliyon
Yuliawan F   +3 more
europepmc   +1 more source

Absolutely closed semigroups. [PDF]

open access: yesRev R Acad Cienc Exactas Fis Nat A Mat
Banakh T, Bardyla S.
europepmc   +1 more source
Some of the next articles are maybe not open access.

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On the Arens Homomorphism

Functional Analysis and Its Applications, 2022
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Turan, Bahri, Aslantaş, Mustafa
openaire   +3 more sources

In praise of homomorphisms

Computer Science Review, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Pavol Hell, Jaroslav Nesetril
openaire   +1 more source

Independence and graph homomorphisms graph homomorphisms

Journal of Graph Theory, 1993
AbstractA graph with n vertices that contains no triangle and no 5‐cycle and minimum degree exceeding n/4 contains an independent set with at least (3n)/7 vertices. This is best possible. The proof proceeds by producing a homomorphism to the 7‐cycle and invoking the No Homomorphism Lemma.
Michael O. Albertson   +2 more
openaire   +1 more source

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