XCompose math

.XCompose

include "%L"   # default Compose file

# exotic

<Multi_key> <o> <o> <o> : "ꙮ"

#typography

<Multi_key> <-> <-> <->: "—"

#Mathbb
<Multi_key> <b> <b> <R> : "ℝ"
<Multi_key> <b> <b> <C> : "ℂ"
<Multi_key> <b> <b> <Z> : "ℤ"
<Multi_key> <b> <b> <N> : "ℕ"
<Multi_key> <b> <b> <Q> : "ℚ"
<Multi_key> <b> <b> <K> : "𝕂"
<Multi_key> <b> <b> <H> : "ℍ"

<Multi_key> <b> <b> <1> : "𝟙"

##Probability
<Multi_key> <b> <b> <E> : "𝔼"
<Multi_key> <b> <b> <P> : "ℙ"


#Mathcal
<Multi_key> <m> <c> <G> : "𝓖"
<Multi_key> <m> <c> <P> : "𝒫"
<Multi_key> <m> <c> <M>: "𝓜"

#greek
<Multi_key> <g> <a> : "α"
<Multi_key> <g> <A> : "Α"
<Multi_key> <g> <b> : "β"
<Multi_key> <g> <B> : "Β"
<Multi_key> <g> <c> : "ψ"
<Multi_key> <g> <C> : "Ψ"
<Multi_key> <g> <d> : "δ"
<Multi_key> <g> <D> : "Δ"
<Multi_key> <g> <e> : "ε"
<Multi_key> <g> <E> : "Ε"
<Multi_key> <g> <f> : "φ"
<Multi_key> <g> <F> : "Φ"
<Multi_key> <g> <g> : "γ"
<Multi_key> <g> <G> : "Γ"
<Multi_key> <g> <h> : "η"
<Multi_key> <g> <H> : "Η"
<Multi_key> <g> <i> : "ι"
<Multi_key> <g> <I> : "Ι"
<Multi_key> <g> <j> : "ξ"
<Multi_key> <g> <J> : "Ξ"
<Multi_key> <g> <k> : "κ"
<Multi_key> <g> <K> : "Κ"
<Multi_key> <g> <l> : "λ"
<Multi_key> <g> <L> : "Λ"
<Multi_key> <g> <m> : "μ"
<Multi_key> <g> <M> : "Μ"
<Multi_key> <g> <n> : "ν"
<Multi_key> <g> <N> : "Ν"
<Multi_key> <g> <o> : "ο"
<Multi_key> <g> <O> : "Ο"
<Multi_key> <g> <p> : "π"
<Multi_key> <g> <P> : "Π"
<Multi_key> <g> <r> : "ρ"
<Multi_key> <g> <R> : "Ρ"
<Multi_key> <g> <s> : "σ"
<Multi_key> <g> <S> : "Σ"
<Multi_key> <g> <t> : "τ"
<Multi_key> <g> <T> : "Τ"
<Multi_key> <g> <u> : "θ"
<Multi_key> <g> <U> : "Θ"
<Multi_key> <g> <v> : "ω"
<Multi_key> <g> <V> : "Ω"
<Multi_key> <g> <y> : "υ"
<Multi_key> <g> <Y> : "Υ"
<Multi_key> <g> <z> : "ς"
<Multi_key> <g> <Z> : "Σ"

#math prefix
<Multi_key> <m> <i> <n> <f> : "∞"
<Multi_key> <m> <i> <n> : "∈"
<Multi_key> <m> <o> <+> : "⊕"
<Multi_key> <m> <o> : "∘"

<Multi_key> <m> <d>: "∂"
<Multi_key> <m> <p> <m>: "±"
<Multi_key> <m> <m> <p>: "∓"

#big symbols
<Multi_key> <i> <n> <t>: "∫"
<Multi_key> <s> <u> <m>: "∑"
<Multi_key> <p> <r> <o> <d>: "∏"

#math non-prefixed
<Multi_key> <s> <q> <r> <t> : "√"
<Multi_key> <i> <n> <f>: "∞"


<Multi_key> <n> <e>: "≠"
<Multi_key> <e> <q> <u>: "≡"
<Multi_key> <s> <i> <m>: "∼"
<Multi_key> <~> <=>: "≃"
<Multi_key> <~> <~>: "≈"

<Multi_key> <d> <e> <f>: "≔"

<Multi_key> <p> <r> <e> <c>: "≺"
<Multi_key> <s> <u> <c> <c>: "≻"

<Multi_key> <l> <l>: "≪"
<Multi_key> <g> <g> <g>: "≫"
<Multi_key> <g> <r> <a> <d>: "∇"

#arrows

<Multi_key> <i> <f> <f> : "⟺"
<Multi_key> <=> <>>: "⇒"
<Multi_key> <i> <n> <j>: "↪"
<Multi_key> <m> <a> <p> <t> <o>: "↦"
<Multi_key> <h> <a> <r> <p>: "⇀"

#logic
<Multi_key> <a> <s> <s> <e> <r> <t>: "⊢"
<Multi_key> <e> <x> <i> <s> <t>: "∃"
<Multi_key> <a> <n> <y>: "∀"
<Multi_key> <n> <e> <g>: "⌐"

#set
<Multi_key> <b> <c> <a> <p> : "⋂"
<Multi_key> <b> <c> <u> <p>: "⋃"
<Multi_key> <c> <a> <p> : "∩"
<Multi_key> <c> <u> <p>: "∪"
<Multi_key> <i> <n>: "∈"

<Multi_key> <n> <i> <n>: "∉"
<Multi_key> <i> <n> <c> <l>: "⊂"

<Multi_key> <o> <+> : "⊕"
<Multi_key> <o> <*> : "⨂"
<Multi_key> <o> <.> : "⨀"

<Multi_key> <o> <r>: "∨"
<Multi_key> <a> <n> <d>: "∧"

<Multy_key> <c> <+>: "⊕"
<Multy_key> <c> <->: "⊖"
<Multy_key> <c> <x>: "⊗"
<Multy_key> <c> </>: "⊘"
<Multy_key> <c> <d>: "⊙"
<Multi_key> <c><c>:"⊚"
<Multy_key> <c> <*>: "⊛"
<Multi_key> <c> <=>: "⊜"


#math bracket-like
<Multi_key> <b> <r> <a>: "⟨"
<Multi_key> <k> <e> <t>: "⟩"


<Multi_key> <bar> <greater> : "⊳"

Thank you, this saved me a lot of time!