3. Exponent bounds

3.1 Self-conjugacy exponent bounds3.1.1 Turyn’s exponent bound3.1.2 The coset intersection lemma3.1.3 McFarland difference sets3.1.4 Semiregular relative difference sets3.1.5 Two recent families of difference sets3.1.6 Chen difference sets3.1.7 Davis-Jedwab difference sets3.2 Field descent exponent bounds3.2.1 A general exponent bound for difference sets3.2.2 Difference sets with ${\rm gcd}(v,n) > 1$3.2.3 Towards Ryser’s conjecture3.2.4 Circulant Hadamard matrices and Barker sequences3.2.5 Relative difference sets and planar functions3.2.6 Group invariant weighing matrices