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This tag is used if a reference is needed in a paper or textbook on a specific result.

1 vote
2 answers
200 views

Disks Packing Variant

Usually disk packing problems require that no two disks of the packing intersect. Does anybody know if the problem has been studied when disks may intersect but they are not allowed to contain the …
marc's user avatar
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2 votes
2 answers
2k views

Number of Ordered Trees of given degree sequence

Is there any result known about counting the number of (unlabeled) ordered trees which follow a given unordered degree sequence? Here an ordered tree is understood as a rooted tree in which the order …
marc's user avatar
  • 57