| U~ (defined in notations of fundamental concepts in physics) |
| U(1) (defined in gluons, quarks and QCD) |
| UFT (defined in topic on mathematical physics and physical mathematics applications) |
| ULFT (defined in Quantum Paradoxes and Bell's inequalities) |
| ultracold 3-boson system (defined in Efimov states) |
| ultracold atomic quantum gases (defined in bibliography for theoretical physics) |
| ultracold heteronuclear molecules (defined in bibliography for theoretical physics) |
| ultra-complex systems (defined in ultracomplex systems and categorical dynamics) |
| ultra-complex systems (defined in highly complex systems) |
| ultracomplex systems and categorical dynamics |
| ultra-high resolution spectroscopy in solutions and gels (defined in Fluorescence cross-correlation spectroscopy (FCCS)) |
| uncertainty by waves |
| unified field theories (defined in topic on mathematical physics and physical mathematics applications) |
| unified local field theory (defined in Quantum Paradoxes and Bell's inequalities) |
| uniform continuity over locally compact quantum groupoids |
| uniform continuity over quantum groupoids (defined in uniform continuity over locally compact quantum groupoids) |
| uni-molecular chemical reaction (defined in category of molecular reactions) |
| union (defined in non-Abelian algebraic topology) |
| unital $C^*$-algebra (defined in algebraic quantum field theories (AQFT)) |
| unital subalgebra (defined in weak Hopf C*-algebra) |
| unitary groupoid representation (defined in quantum symmetries from group and groupoid representations) |
| unit law (defined in category) |
| unit vector (defined in algebraic quantum field theories (AQFT)) |
| universal chains (defined in generalized Van Kampen theorems (HD-GVKT) -- higher dimensional) |
| universal constant (defined in Axioms of Physics) |
| universal constant (defined in Axioms of Physics) |
| universal constant (defined in Fundamental physical concepts) |
| universal constant (defined in Fundamental physical concepts) |
| universal cover (defined in generalized Van Kampen theorems (HD-GVKT) -- higher dimensional) |
| Universal Turing Automata (defined in Towers and Galileo) |
| Universal Turing (UT) machines (defined in category of automata) |
| Universal Turing (UT) machines (=category of automata) |
| universe (=universe of discourse) |
| Universe |
| universe of discourse |
| UNIX (defined in topic on computational physics) |
| using convolution to find Laplace transforms |
| UT (defined in category of automata) |
| UTA (defined in Towers and Galileo) |
| UTM (defined in topic on computational physics) |
| UTs (=category of automata) |
| UV (defined in spectroscopy topics) |