The second case of Fermat's last theorem for fixed irregular prime exponents. Robert Walter. Sompolski 10027/15723 https://indigo.uic.edu/articles/thesis/The_second_case_of_Fermat_s_last_theorem_for_fixed_irregular_prime_exponents_/10878914 The second case of Fermat's last theorem for fixed irregular prime exponents. 2014-03-18 00:00:00 Mathematics.