Why $\pi$ appears in Dirac?
137430
Limit that appears in particle physics calculation
18546
Geometric intuition for $\pi /4 = 1 - 1/3 + 1/5 - \cdots$?
140459
Why is $\left(e^{2\pi i}\right)^i \neq e^{-2 \pi}$?
154900
Why is $\pi$ = 3.14... instead of 6.28...?
123776
Questions about the Fermi-Dirac distribution at $T=0.$
75394
Why is the $dx$ right next to the integral sign in QFT literature?
157946
Elementary derivation of certian identites related to the Riemannian Zeta function and the Euler-Mascheroni Constant
50038
Proving that $e^\pi=e^{-\pi}$
124703
Where does the $i$ come from in the Schrödinger equation?
61209
Interpretation of the Dirac-measure property
112628
What is the origin of the Dirac delta term in the dipole electric field?
51435
What was missing in Dirac's argument to come up with the modern interpretation of the positron?
54814
What is this symbol $\int$ called?
40837
Why $e^{i(π/3)} \ne -1$?
83290
How is the value of $\pi$ ( Pi ) actually calculated?
123892
What is $\int_{-\pi}^\pi \cos(nx)\cos(mx)\,dx$?
138355
Improper rational/trig integral comes out to $\pi/e$