Unicode Dictionary

Remember, you can always look up how a symbol is input using your editor. In Emacs, place your cursor over the symbol and type M-x describe-char. A window will pop up with details about the symbol: the line beginning with to input: is what you want. In VSCode, use the command C-x C-=. A text box will appear that you can paste the character into. Test it out on the symbol here: ⊗.

CharInput
λ\Gl or \lambda
→\-> or \to
Π\Pi
×\times
Σ\GS or \Sigma
∈\in
ℕ, ℤ, etc.\bN, \bZ, etc.
₁, ₂, etc.\_1, \_2, etc.
¹, ², etc.\^1, \^2, etc.
ᵃ, ᵇ, etc.\^a, \^b, etc.
⁻\^-
·\cdot
⊤\top
∅\emptyset or \0
ℓ\ell
∘\circ
⊎\uplus
¬\neg
∀\all or \forall
∃\ex or \exists
≡\== or \equiv
≃\~- or \simeq
∨\vee
∧\wedge
≠\neq or \ne
≢\nequiv
∣\mid
∥\parallel
∂\partial
∙\bullet
∎\qed
○\cw
⟨, ⟩\langle, \rangle
α\Ga or \alpha
β\Gb or \beta
ε\Ge or \varepsilon
η\Gh or \eta
θ\Gth or \theta
ι\Gi or \iota
φ\Gf or \phi
ψ\Gp or \psi
Ω\GO or \Omega