1 Subjects: “...first-order theory...”

2 Subjects: “...probability theory...”

3 Subjects: “...information theory...”

4 Subjects: “...density functional theory...”

5 Subjects: “...category theory...”

6 Subjects: “...optimal investment theory...”

7 Subjects: “...knot theory...”

8 Subjects: “...control theory...”

9 Subjects: “...replica theory...”

10 Subjects: “...similarity theory...”

11 Subjects: “...bifurcation theory...”

12 Subjects: “...genus theory...”

13 Subjects: “...semigroup theory...”