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5

Proposal: merge gcd and lcm We tend to combine homologus objects into one tag, like supremum-and-infimum, limsup-and-liminf and even-and-odd-functions. It's well known that $ab = \gcd(a,b) \times \mathrm{lcm}(a,b)$, so knowing the gcd implies the same for lcm, and vice versa. The majority of lcm questions are also tagged with gcd.


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No. If they want to talk about truncatable primes or russian doll primes, we have the prime numbers tag. Number of such concatenations, combinatorics. Use in code: programming, or computer algebra systems (or computer science stack exchange). They are already separated by type, in the tags used ( questionable if correctly however).


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