1 <!ENTITY alpha "α" ><!-- greek small letter alpha, U+03B1 ISOgrk3 -->
2 <!ENTITY and "∧" ><!-- logical and = wedge, U+2227 ISOtech -->
3 <!ENTITY beta "β" ><!-- greek small letter beta, U+03B2 ISOgrk3 -->
4 <!ENTITY chi "χ" ><!-- greek small letter chi, U+03C7 ISOgrk3 -->
5 <!ENTITY ctdot "⋯" ><!--/cdots, three dots, centered -->
6 <!ENTITY delta "δ" ><!-- greek small letter delta, U+03B4 ISOgrk3 -->
7 <!ENTITY DifferentialD "ⅆ" ><!--d for use in differentials, e.g., within integrals -->
8 <!ENTITY epsilon "ε" ><!-- greek small letter epsilon, U+03B5 ISOgrk3 -->
9 <!ENTITY eta "η" ><!-- greek small letter eta, U+03B7 ISOgrk3 -->
10 <!ENTITY ExponentialE "ⅇ" ><!--e use for the exponential base of the natural logarithms -->
11 <!ENTITY gamma "γ" ><!-- greek small letter gamma, U+03B3 ISOgrk3 -->
12 <!ENTITY Gamma "Γ" ><!-- greek capital letter gamma, U+0393 ISOgrk3 -->
13 <!ENTITY ge "≥" ><!-- greater-than or equal to, U+2265 ISOtech -->
14 <!ENTITY gt ">" ><!-- greater-than sign, U+003E ISOnum -->
15 <!ENTITY ImaginaryI "ⅈ" ><!--i for use as a square root of -1 -->
16 <!ENTITY infin "∞" ><!-- infinity, U+221E ISOtech -->
17 <!ENTITY int "∫" ><!-- integral, U+222B ISOtech -->
18 <!ENTITY iota "ι" ><!-- greek small letter iota, U+03B9 ISOgrk3 -->
19 <!ENTITY isin "∈" ><!-- element of, U+2208 ISOtech -->
20 <!ENTITY kappa "κ" ><!-- greek small letter kappa, U+03BA ISOgrk3 -->
21 <!ENTITY lambda "λ" ><!-- greek small letter lambda, U+03BB ISOgrk3 -->
22 <!ENTITY Laplacetrf "ℒ" ><!--Laplace transform -->
23 <!ENTITY le "≤" ><!-- less-than or equal to, U+2264 ISOtech -->
24 <!ENTITY mu "μ" ><!-- greek small letter mu, U+03BC ISOgrk3 -->
25 <!ENTITY not "¬" ><!-- not sign, U+00AC ISOnum -->
26 <!ENTITY nu "ν" ><!-- greek small letter nu, U+03BD ISOgrk3 -->
27 <!ENTITY omega "ω" ><!-- greek small letter omega, U+03C9 ISOgrk3 -->
28 <!ENTITY or "∨" ><!-- logical or = vee, U+2228 ISOtech -->
29 <!ENTITY PartialD "∂" ><!--alias ISOTECH part -->
30 <!ENTITY phi "φ" ><!-- greek small letter phi, U+03C6 ISOgrk3 -->
31 <!ENTITY pi "π" ><!-- greek small letter pi, U+03C0 ISOgrk3 -->
32 <!ENTITY prod "∏" ><!-- n-ary product = product sign, U+220F ISOamsb -->
33 <!ENTITY psi "ψ" ><!-- greek small letter psi, U+03C8 ISOgrk3 -->
34 <!ENTITY rarr "→" ><!-- rightwards arrow, U+2192 ISOnum -->
35 <!ENTITY rho "ρ" ><!-- greek small letter rho, U+03C1 ISOgrk3 -->
36 <!ENTITY rightarrow "→" ><!--alias ISONUM rarr -->
37 <!ENTITY sigma "σ" ><!-- greek small letter sigma, U+03C3 ISOgrk3 -->
38 <!ENTITY sum "∑" ><!-- n-ary sumation, U+2211 ISOamsb -->
39 <!ENTITY tau "τ" ><!-- greek small letter tau, U+03C4 ISOgrk3 -->
40 <!ENTITY theta "θ" ><!-- greek small letter theta, U+03B8 ISOgrk3 -->
41 <!ENTITY times "×" ><!-- multiplication sign, U+00D7 ISOnum -->
42 <!ENTITY upsilon "υ" ><!-- greek small letter upsilon, U+03C5 ISOgrk3 -->
43 <!ENTITY xi "ξ" ><!-- greek small letter xi, U+03BE ISOgrk3 -->
44 <!ENTITY zeta "ζ" ><!-- greek small letter zeta, U+03B6 ISOgrk3 -->