Norman Bradley Fox

3 Questions 5 Answers 0 Followers

Questions related from Norman Bradley Fox

What are the zero divisors of the quotient ring Z_4[x]/(x^3-x^2-2,2x^2,2x)?

I thought the zero divisors were the polynomials of the form ax^2+bx+2c where a,b,c=0 or 1. But I've since figured out that this quotient ring is not local, so there exists other zero divisors...

08 December 2023 1,688 1 View

What is the smallest N so that for all n>N, there are at least 2^(n/2)-2 prime numbers in the interval [2^(n-1),2^n]?

Alternatively, are there any results that estimate the number of primes between powers of 2, or pi(2^n)-pi(2^(n-1))?

22 August 2019 9,026 6 View

Is the corona of a cycle C_n and the empty graph \overline(K_m) a prime graph for all n and m?

I've seen incorrect proofs for some cases of m, and I've seen it claimed to be proven by Tout, Dabboucy, and Howalla, but cannot access their paper.

07 July 2017 2,133 2 View