Formulas
- Integer complexity
- Integer triangle
- Integral linear operator
- Integral of the secant function
- Integration by parts
- Integration by substitution
- Integration using Euler's formula
- Intensity (physics)
- Interaction picture
- Intermediate value theorem
- Internal energy
- Kirchhoff's circuit laws
- Kirchhoff's law of thermal radiation
- Kleiber's law
- Klein quartic