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54 votes

Why the galaxies form 2D planes (or spiral-like) instead of 3D balls (or spherical-like)?

gravity angular-momentum astrophysics galaxies star-clusters asked Jan 15 '14 at 19:39
physics.stackexchange.com

38 votes

The Origin(s) of Modular and Moduli

ag.algebraic-geometry nt.number-theory at.algebraic-topology ct.category-theory topological-modular-form asked May 12 '18 at 5:22
mathoverflow.net

27 votes

Zero modes ~ zero eigenvalue modes ~ zero energy modes?

quantum-field-theory string-theory research-level topological-field-theory topological-order asked Aug 13 '13 at 15:23
physics.stackexchange.com

19 votes

Duality between Euclidean time and finite temperature, QFT and quantum gravity, and AdS/CFT

quantum-field-theory gravity string-theory statistical-mechanics research-level asked Jun 21 '14 at 19:13
physics.stackexchange.com

18 votes

Subtlety of analytic continuation - Euclidean / Minkowski path integral

string-theory path-integral wick-rotation asked Nov 6 '13 at 2:38
physics.stackexchange.com

18 votes

Phase Structure of (Quantum) Gauge Theory

quantum-field-theory gauge-theory topological-field-theory topological-order phase-diagram asked Mar 8 '14 at 7:27
physics.stackexchange.com

18 votes

Do all massless particles (e.g. photon, graviton, gluon) necessarily have the same speed $c$?

quantum-field-theory special-relativity photons speed-of-light mass asked Dec 17 '13 at 5:22
physics.stackexchange.com

17 votes

Orbifold CFT of SU(2)/G and SO(3)/G

string-theory research-level conformal-field-theory topological-field-theory chern-simons-theory asked Dec 23 '13 at 20:24
physics.stackexchange.com

17 votes

about the Atiyah-Segal axioms on topological quantum field theory

string-theory mathematical-physics research-level topological-field-theory category-theory asked Jan 10 '14 at 23:36
physics.stackexchange.com

17 votes

Number Theory and Gravity

nt.number-theory mp.mathematical-physics algebraic-number-theory langlands-conjectures geometric-langlands asked Feb 4 at 0:54
mathoverflow.net

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