keycode 17 = 8 asterisk infinity U2219
! U2248 is almost equal (asymptotic)
keycode 18 = 9 parenleft U2248
+! U2205 is the empty set
keycode 19 = 0 parenright emptyset
! U2213 is minus-or-plus
keycode 20 = minus underscore notsign U2213
! U1E84 is LATIN CAPITAL LETTER W WITH DIAERESIS
keycode 25 = w W Greek_omega U1E84
! U2203 is there exists
-keycode 26 = e E Greek_epsilon U2203
+! U2130 is the electromotive force
+! U212F is the natural exponent symbol (script small e)
+keycode 26 = e E Greek_epsilon U2130
! U211D is the set of reals numbers
keycode 27 = r R Greek_rho U211D
keycode 28 = t T Greek_tau Greek_theta
keycode 30 = u U Greek_eta
! U222C is a double integral
keycode 31 = i I integral U222C
-keycode 32 = o O elementof Greek_OMEGA
-keycode 33 = p P Greek_pi Greek_PI
+! U2126 is the ohm sign (different codepoint from Omega (U03A9))
+keycode 32 = o O elementof U@126
+! U220F is the n-ary product (different codepoint from Pi (U03A0))
+keycode 33 = p P Greek_pi U220F
keycode 34 = bracketleft braceleft leftsinglequotemark leftdoublequotemark
keycode 35 = bracketright braceright rightsinglequotemark rightdoublequotemark
! U2200 is for all
keycode 38 = a A Greek_alpha U2200
-keycode 39 = s S Greek_sigma Greek_SIGMA
+! U2211 is the n-ary summation (different codepoint from Sigma (U03A3))
+keycode 39 = s S Greek_sigma U2211
! U2202 is partial differential
! (for some reason the keysym partialderivative wasn't working on my eeepc).
keycode 40 = d D U2202 Greek_delta
keycode 41 = f F function Greek_phi
keycode 42 = g G Greek_gamma Greek_GAMMA
-keycode 43 = h H degree
+! U2103 is degrees Celsius
+keycode 43 = h H degree U2103
! U062A is Arabic "teh", looks like a smiley face :)
keycode 44 = j J j U062A
! U062A is Arabic "teh with ring", looks like a goofey face :p
keycode 54 = c C Greek_chi
keycode 55 = v V Greek_nu
keycode 56 = b B Greek_beta
+!
keycode 57 = n N Greek_DELTA nabla
-keycode 58 = m M mu
+! U00B5 is the micro sign (similar to mu, but different codepoint)
+keycode 58 = m M mu U00B5
! includedin = 'subset of'
! includes = 'superset of'
-keycode 59 = comma less includedin guillemotleft
-keycode 60 = period greater includes guillemotright
+!
+! U2131 is the Fourier transform
+! U2112 is the Laplace transform
+keycode 59 = comma less U2131 U2112
+keycode 60 = period greater includes
keycode 61 = slash question rightarrow questiondown