infinity

U+221E

right angle

U+221F

angle

U+2220

measured angle

U+2221

spherical angle

U+2222

divides

U+2223

does not divide

U+2224

parallel to

U+2225

not parallel to

U+2226

logical and

U+2227

logical or

U+2228

intersection

U+2229

union

U+222A

integral

U+222B

double integral

U+222C

triple integral

U+222D

contour integral

U+222E

surface integral

U+222F

volume integral

U+2230

clockwise integral

U+2231

clockwise contour integral

U+2232

anticlockwise contour integral

U+2233

therefore

U+2234

because

U+2235

ratio

U+2236

proportion

U+2237

dot minus

U+2238

excess

U+2239

geometric proportion

U+223A

homothetic

U+223B