- Jarnik, W.
- Jarratt, P.
- Jaskowskǐ
- Jastrow illusion
- Jastrow, J.
- Jean de Linieres
- 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.