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JCT
2007

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What power of two divides a weighted Catalan number?

15 years 1 months ago

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Given a sequence of integers b = (b0,b1,b2,...) one gives a Dyck path P of length 2n the weight wt(P) = bh1 bh2 ···bhn , where hi is the height of the ith ascent of P. The corr...

Alexander Postnikov, Bruce E. Sagan

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JFP
2007

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What is the meaning of these constant interruptions?

15 years 1 months ago

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Asynchronous exceptions, or interrupts, are important for writing robust, modular programs, but are traditionally viewed as being diﬃcult from a semantic perspective. In this ar...

Graham Hutton, Joel Wright

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CGA
2005

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Do You See What I Mean?

15 years 1 months ago