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List Question

Expression that only result a natural number

Recurrences that cannot be solved by the master theorem

Peano's Postulates Proofs

Better representaion of natural numbers as sets?

multiple approaches/ways to prove that $1000^N - 1$ cannot be a divisor of $1978^N - 1$

Prove 24 divides $u^3-u$ for all odd natural numbers $u$

Cardinality natural numbers

What does Russell mean when he defines the “Posterity… with respect to the immediate predecessor”?

Function to convert each number in a M..N to another number in the same range

Does such a natural number exist, that it would be divisible by every other natural number

Given real numbers: define integers?

Is there a set theoretic construction of the natural numbers or integers such that the product of two numbers is their Cartesian product?

Proof for the divisibility of natural numbers by at least one prime

Connecting functional identity of a function with its image set

$a+b+c+d+e=abcde$ What is $\max(a)?$

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