symbol | name | keyboard |
---|
√ |
square root |
ALT-251, ⌥ v |
∛ ∜ |
cube root & quad root |
|
÷ |
obelus (ah-bel-us), 6÷2=3 |
ALT-246, ⌥ / |
× |
product, multiplication, times, 5×4=20 |
  |
𝑥 |
italics x |
|
ℯ |
base of natural logarithm e |
|
𝒾 |
italics i, imaginary number |
|
∘ |
function composition, as in f∘g |
|
∫ |
Integral for calculus |
⌥ b |
≈ |
approximate, as in π ≈ 3.14 |
⌥ x |
≠ |
not equal to, as in 1+1≠3 |
⌥ = |
≡ |
modular arithmetic congruence |
|
≅ |
geometry congruence |
|
± |
plus or minus |
ALT-241, ⌥ + |
∙ |
multiplication dot or bullet |
ALT-0149, ⌥ 8 |
⟌ |
long division operator |
|
≥ |
greater than or equal to |
ALT-242, ⌥ > |
≤ |
less than or equal to |
ALT-243, ⌥ < |
∪ |
UNION, interval notation, "Joining" |
ALT-8746 |
⋂ |
INTERSECTION, interval notation, "overlap" |
ALT-8745 |