there is no Sigmaf, and no U+03A2 character either
Sigma ---- "Σ" -- greek capital letter sigma,
U+03A3 ISOgrk3
Tau ---- "Τ" -- greek capital letter tau, U+03A4
Upsilon ---- "Υ" -- greek capital letter upsilon,
U+03A5 ISOgrk3
Phi ---- "Φ" -- greek capital letter phi,
U+03A6 ISOgrk3
Chi ---- "Χ" -- greek capital letter chi, U+03A7
Psi ---- "Ψ" -- greek capital letter psi,
U+03A8 ISOgrk3
Omega ---- "Ω" -- greek capital letter omega,
U+03A9 ISOgrk3
alpha ---- "α" -- greek small letter alpha,
U+03B1 ISOgrk3
beta ---- "β" -- greek small letter beta, U+03B2 ISOgrk3
gamma ---- "γ" -- greek small letter gamma,
U+03B3 ISOgrk3
delta ---- "δ" -- greek small letter delta,
U+03B4 ISOgrk3
epsilon ---- "ε" -- greek small letter epsilon,
U+03B5 ISOgrk3
zeta ---- "ζ" -- greek small letter zeta, U+03B6 ISOgrk3
eta ---- "η" -- greek small letter eta, U+03B7 ISOgrk3
theta ---- "θ" -- greek small letter theta,
U+03B8 ISOgrk3
iota ---- "ι" -- greek small letter iota, U+03B9 ISOgrk3
kappa ---- "κ" -- greek small letter kappa,
U+03BA ISOgrk3
lambda ---- "λ" -- greek small letter lambda,
U+03BB ISOgrk3
mu ---- "μ" -- greek small letter mu, U+03BC ISOgrk3
nu ---- "ν" -- greek small letter nu, U+03BD ISOgrk3
xi ---- "ξ" -- greek small letter xi, U+03BE ISOgrk3
omicron ---- "ο" -- greek small letter omicron, U+03BF NEW
pi ---- "π" -- greek small letter pi, U+03C0 ISOgrk3
rho ---- "ρ" -- greek small letter rho, U+03C1 ISOgrk3
sigmaf ---- "ς" -- greek small letter final sigma,
U+03C2 ISOgrk3
sigma ---- "σ" -- greek small letter sigma,
U+03C3 ISOgrk3
tau ---- "τ" -- greek small letter tau, U+03C4 ISOgrk3
upsilon ---- "υ" -- greek small letter upsilon,
U+03C5 ISOgrk3
phi ---- "φ" -- greek small letter phi, U+03C6 ISOgrk3
chi ---- "χ" -- greek small letter chi, U+03C7 ISOgrk3
psi ---- "ψ" -- greek small letter psi, U+03C8 ISOgrk3
omega ---- "ω" -- greek small letter omega,
U+03C9 ISOgrk3
thetasym ---- "ϑ" -- greek small letter theta symbol,
U+03D1 NEW
upsih ---- "ϒ" -- greek upsilon with hook symbol,
U+03D2 NEW
piv ---- "ϖ" -- greek pi symbol, U+03D6 ISOgrk3
General Punctuation
bull ---- "•" -- bullet = black small circle,
U+2022 ISOpub
bullet is NOT the same as bullet operator, U+2219
hellip ---- "…" -- horizontal ellipsis = three dot leader,
U+2026 ISOpub
prime ---- "′" -- prime = minutes = feet, U+2032 ISOtech
Prime ---- "″" -- double prime = seconds = inches,
U+2033 ISOtech
oline ---- "‾" -- overline = spacing overscore,
U+203E NEW
frasl ---- "⁄" -- fraction slash, U+2044 NEW
Letterlike Symbols
weierp ---- "℘" -- script capital P = power set
= Weierstrass p, U+2118 ISOamso
image ---- "ℑ" -- blackletter capital I = imaginary part,
U+2111 ISOamso
real ---- "ℜ" -- blackletter capital R = real part symbol,
U+211C ISOamso
trade ---- "™" -- trade mark sign, U+2122 ISOnum
alefsym ---- "ℵ" -- alef symbol = first transfinite cardinal,
U+2135 NEW
alef symbol is NOT the same as hebrew letter alef,
U+05D0 although the same glyph could be used to depict both characters
Unicode does not say that lArr is the same as the 'is implied by' arrow
but also does not have any other character for that function. So ? lArr can
be used for 'is implied by' as ISOtech suggests
uArr ---- "⇑" -- upwards double arrow, U+21D1 ISOamsa
rArr ---- "⇒" -- rightwards double arrow,
U+21D2 ISOtech
Unicode does not say this is the 'implies' character but does not have
another character with this function so ?
rArr can be used for 'implies' as ISOtech suggests
dArr ---- "⇓" -- downwards double arrow, U+21D3 ISOamsa
hArr ---- "⇔" -- left right double arrow,
U+21D4 ISOamsa
Mathematical Operators
forall ---- "∀" -- for all, U+2200 ISOtech
part ---- "∂" -- partial differential, U+2202 ISOtech
exist ---- "∃" -- there exists, U+2203 ISOtech
empty ---- "∅" -- empty set = null set = diameter,
U+2205 ISOamso
nabla ---- "∇" -- nabla = backward difference,
U+2207 ISOtech
isin ---- "∈" -- element of, U+2208 ISOtech
notin ---- "∉" -- not an element of, U+2209 ISOtech
ni ---- "∋" -- contains as member, U+220B ISOtech
should there be a more memorable name than 'ni'?
prod ---- "∏" -- n-ary product = product sign,
U+220F ISOamsb
prod is NOT the same character as U+03A0 'greek capital letter pi' though
the same glyph might be used for both
sum ---- "∑" -- n-ary sumation, U+2211 ISOamsb
sum is NOT the same character as U+03A3 'greek capital letter sigma'
though the same glyph might be used for both
minus ---- "−" -- minus sign, U+2212 ISOtech
lowast ---- "∗" -- asterisk operator, U+2217 ISOtech
radic ---- "√" -- square root = radical sign,
U+221A ISOtech
prop ---- "∝" -- proportional to, U+221D ISOtech
infin ---- "∞" -- infinity, U+221E ISOtech
ang ---- "∠" -- angle, U+2220 ISOamso
and ---- "∧" -- logical and = wedge, U+2227 ISOtech
or ---- "∨" -- logical or = vee, U+2228 ISOtech
cap ---- "∩" -- intersection = cap, U+2229 ISOtech
cup ---- "∪" -- union = cup, U+222A ISOtech
int ---- "∫" -- integral, U+222B ISOtech
there4 ---- "∴" -- therefore, U+2234 ISOtech
sim ---- "∼" -- tilde operator = varies with = similar to,
U+223C ISOtech
tilde operator is NOT the same character as the tilde, U+007E,
although the same glyph might be used to represent both
cong ---- "≅" -- approximately equal to, U+2245 ISOtech
asymp ---- "≈" -- almost equal to = asymptotic to,
U+2248 ISOamsr
ne ---- "≠" -- not equal to, U+2260 ISOtech
equiv ---- "≡" -- identical to, U+2261 ISOtech
le ---- "≤" -- less-than or equal to, U+2264 ISOtech
ge ---- "≥" -- greater-than or equal to,
U+2265 ISOtech
sub ---- "⊂" -- subset of, U+2282 ISOtech
sup ---- "⊃" -- superset of, U+2283 ISOtech
note that nsup, 'not a superset of, U+2283' is not covered by the Symbol
font encoding and is not included. Should it be, for symmetry?
It is in ISOamsn
nsub ---- "⊄" -- not a subset of, U+2284 ISOamsn
sube ---- "⊆" -- subset of or equal to, U+2286 ISOtech
supe ---- "⊇" -- superset of or equal to,
U+2287 ISOtech
oplus ---- "⊕" -- circled plus = direct sum,
U+2295 ISOamsb
otimes ---- "⊗" -- circled times = vector product,
U+2297 ISOamsb
perp ---- "⊥" -- up tack = orthogonal to = perpendicular,
U+22A5 ISOtech
sdot ---- "⋅" -- dot operator, U+22C5 ISOamsb
dot operator is NOT the same character as U+00B7 middle dot
lang is NOT the same character as U+003C 'less than'
or U+2039 'single left-pointing angle quotation mark'
rang ---- "〉" -- right-pointing angle bracket = ket,
U+232A ISOtech
rang is NOT the same character as U+003E 'greater than'
or U+203A 'single right-pointing angle quotation mark'