J~ (defined in notations of fundamental concepts in physics)

Jacques Tits

Jan \L{}ukasiewicz

Java (defined in topic on computational physics)

JB-algebra (defined in Jordan-Banach and Jordan-Lie algebras)

JB-algebra (defined in quantum groups and von Neumann algebras)

$JBWA$ (defined in quantum groups and von Neumann algebras)

JBW algebra (defined in Jordan-Banach and Jordan-Lie algebras)

JBW-algebra (defined in quantum groups and von Neumann algebras)

JC--algebra (defined in Jordan-Banach and Jordan-Lie algebras)

JL-algebra (defined in Jordan-Banach and Jordan-Lie algebras)

JLB algebra (defined in Jordan-Banach and Jordan-Lie algebras)

John Griggs Thompson

John H van Vleck

John Thompson (=John Griggs Thompson)

Jordan-Banach algebra (defined in Jordan-Banach and Jordan-Lie algebras)

Jordan-Banach and Jordan-Lie algebras

Jordan-Banach-von Neumann algebra (defined in quantum groups and von Neumann algebras)

Jordan-Lie algebra (defined in Jordan-Banach and Jordan-Lie algebras)

Jordan triple product (defined in Jordan-Banach and Jordan-Lie algebras)

Josephson effect (defined in quantum tunneling)

Josephson junctions (defined in quantum tunneling)

Josephson quantum effect (=quantum tunneling)

J/psi meson (defined in gluons, quarks and QCD)