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B_(p+k)=B_k+B_(k+1) (mod p), when p is prime and B_n is a Bell number.

1. Zero is a number. 2. If a is a number, the successor of a is a number. 3. zero is not the successor of a number. 4. Two numbers of which the successors are equal are ...

Schubert's application of the conservation of number principle.

The operation of taking an nth root of a number.

When ac is divisible by a number b that is relatively prime to a, then c must be divisible by b.

An integer n which is tested to see if it divides a given number.

The order of a finite field is the number of elements it contains.

If a prime number divides a norm but not the bases of the norm, it is itself a norm.

The graph complement of a graph hole. Graph antiholes are called even if they have an even number of vertices and odd if they have an odd number of vertices (Chvátal). No odd ...

A number of the form a_0+a_1zeta+...+a_(p-1)zeta^(p-1), where zeta=e^(2pii/p) is a de Moivre number and p is a prime number. Unique factorizations of cyclotomic integers fail ...