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math.CO2003
What majority decisions are possible
Saharon Shelah
The main result is the following: Let X be a finite set and D be a non empty family of choice functions for (X choose 2) closed under permutation of X. Then the following condition…
math.CO2000
A Partition Theorem
Saharon Shelah
We prove the following: there is a primitive recursive function f_-^*(-,-), in the three variables, such that: for every natural numbers t,n>0, and c, for any natural number k>=f^*…