Results 251 to 260 of about 87,663 (288)

Comparative transcriptomics reveal the common anteroposterior molecular blueprint of adult bilaterian guts. [PDF]

open access: yesPLoS Biol
Vianello SD   +11 more
europepmc   +1 more source

Partially Ordered Sets

2008
We introduce the notion of a partially ordered set (poset) we and define several types of special elements associated with partial orders.
Dan A. Simovici, Chabane Djeraba
openaire   +2 more sources

Partially Ordered Sets

1986
Partially ordered sets, or posets, appear in many branches of mathematics, but they are fundamental in combinatorics. For example, many of the important enumeration techniques (generating functions, inclusion-exclusion) have their theoretical foundation in some underlying poset.
Dennis Stanton, Dennis White
openaire   +2 more sources

Endomorphisms of Partially Ordered Sets

Combinatorics, Probability and Computing, 1998
It is shown that every partially ordered set with n elements admits an endomorphism with an image of a size at least n1/7 but smaller than n. We also prove that there exists a partially ordered set with n elements such that each of its non-trivial endomorphisms has an image of size O((n log n)1/3).
Duffus, Dwight   +3 more
openaire   +2 more sources

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