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55 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

41 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

32 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

30 votes

How to travel to this tower with a gorgeous view toward Mount Fuji?

trains japan identify-this tokyo mount-fuji asked Mar 10 at 22:14
travel.stackexchange.com

22 votes

How to convert the $\LaTeX$ format to Mathematica input?

latex conversion input asked Dec 6 '16 at 1:08
mathematica.stackexchange.com

21 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

21 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

20 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

20 votes

Subtlety of analytic continuation - Euclidean / Minkowski path integral

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

19 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

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Top Answers
21
Mathematical research published in the form of poems
mathoverflow.net

16
What is a $p_x + i p_y$ superconductor? Relation to topological superconductors
physics.stackexchange.com

14
Is there a difference between 愿意 and 肯?
chinese.stackexchange.com

10
Are the Maxwell's equations enough to derive the law of Coulomb?
physics.stackexchange.com

10
What is the difference between Chiral anomaly, ABJ anomaly, and Axial anomaly?
physics.stackexchange.com

9
Chinese equivalent of “I can honestly say…”
chinese.stackexchange.com

8
Anomalies for not-on-site discrete gauge symmetries
physics.stackexchange.com

8
Why is conformal invariance only possible for massless theories?
mathoverflow.net

7
Explicit 2-Cocycles of G=Z2×Z2xZ2 over U(1)
mathoverflow.net

7
Occurrences of (co)homology in other disciplines and/or nature
mathoverflow.net

6
Why do we require the generators of $\mathrm{SU(N)}$ gauge theories to be $N \times N$ matrices?
physics.stackexchange.com

6
What is charge?
physics.stackexchange.com

6
Explicit 3-cocycle of a cyclic group
mathoverflow.net

6
TQFT characterization of braiding statistics
mathoverflow.net

5
Is there any theory for origination of charge?
physics.stackexchange.com

5
Quantum Anomalies for Bosons
physics.stackexchange.com

5
Accidental, unplanned breakthroughs in Mathematics
mathoverflow.net

5
3-cocycle representatives for the dihedral group $D_{2n}$?
mathoverflow.net

5
Orbit and stabilizer of the representation of multiplication decomposition of $U(3)$
math.stackexchange.com

5
A reading list for topological quantum field theory?
mathoverflow.net

5
Learning roadmap to TQFT from a mathematics perspective
mathoverflow.net

5
What is the difference between 魂 and 魄?
chinese.stackexchange.com