- Jean de Meurs
- Jeans, J.H.
- jeep problem
- Jeffery, G.B.
- Jeffery, R.L.
- Jeffreys method
- Jeffreys, S.H.
- Jenkins, J.A.
- Jenkins theorem
- Jensen disk
- Jensen formula
- Jensen inequality
- Jensen, J.L.W.
- Jensen polynomial
- Jensen theorem
- Jerabek antipode
- Jerabek center
- Jerabek hyperbola
- Jerabek, V.
- Jerison, M.
- jerk
- Jerrard, G.B.
- Jerrard theorem
- Jessen, B.
- Jessen orthogonal icosahedron