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<!ENTITY psi "ψ"> <!-- U+03C8 ISOgrk3 - greek small letter psi --><!ENTITY omega "ω"> <!-- U+03C9 ISOgrk3 - greek small letter omega --><!ENTITY thetasym "ϑ"> <!-- U+03D1 NEW - greek small letter theta symbol --><!ENTITY upsih "ϒ"> <!-- U+03D2 NEW - greek upsilon with hook symbol --><!ENTITY piv "ϖ"> <!-- U+03D6 ISOgrk3 - greek pi symbol --><!-- General Punctuation --><!ENTITY bull "•"> <!-- U+2022 ISOpub - bullet = black small circle --><!ENTITY hellip "…"> <!-- U+2026 ISOpub - horizontal ellipsis = three dot leader --><!ENTITY prime "′"> <!-- U+2032 ISOtech - prime = minutes = feet --><!ENTITY Prime "″"> <!-- U+2033 ISOtech - double prime = seconds = inches --><!ENTITY oline "‾"> <!-- U+203E NEW - overline = spacing overscore --><!ENTITY frasl "⁄"> <!-- U+2044 NEW - fraction slash --><!-- Letterlike Symbols --><!ENTITY weierp "℘"> <!-- U+2118 ISOamso - script capital P = power set = Weierstrass p --><!ENTITY image "ℑ"> <!-- U+2111 ISOamso - blackletter capital I = imaginary part --><!ENTITY real "ℜ"> <!-- U+211C ISOamso - blackletter capital R = real part symbol --><!ENTITY trade "™"> <!-- U+2122 ISOnum - trade mark sign --><!ENTITY alefsym "ℵ"> <!-- U+2135 NEW - alef symbol = first transfinite cardinal --><!-- Arrows --><!ENTITY larr "←"> <!-- U+2190 ISOnum - leftwards arrow --><!ENTITY uarr "↑"> <!-- U+2191 ISOnum - upwards arrow --><!ENTITY rarr "→"> <!-- U+2192 ISOnum - rightwards arrow --><!ENTITY darr "↓"> <!-- U+2193 ISOnum - downwards arrow --><!ENTITY harr "↔"> <!-- U+2194 ISOamsa - left right arrow --><!ENTITY crarr "↵"> <!-- U+21B5 NEW - downwards arrow with corner leftwards = carriage return --><!ENTITY lArr "⇐"> <!-- U+21D0 ISOtech - leftwards double arrow --><!ENTITY uArr "⇑"> <!-- U+21D1 ISOamsa - upwards double arrow --><!ENTITY rArr "⇒"> <!-- U+21D2 ISOtech - rightwards double arrow --><!ENTITY dArr "⇓"> <!-- U+21D3 ISOamsa - downwards double arrow --><!ENTITY hArr "⇔"> <!-- U+21D4 ISOamsa - left right double arrow --><!-- Mathematical Operators --><!ENTITY forall "∀"> <!-- U+2200 ISOtech - for all --><!ENTITY part "∂"> <!-- U+2202 ISOtech - partial differential --><!ENTITY exist "∃"> <!-- U+2203 ISOtech - there exists --><!ENTITY empty "∅"> <!-- U+2205 ISOamso - empty set = null set = diameter --><!ENTITY nabla "∇"> <!-- U+2207 ISOtech - nabla = backward difference --><!ENTITY isin "∈"> <!-- U+2208 ISOtech - element of --><!ENTITY notin "∉"> <!-- U+2209 ISOtech - not an element of --><!ENTITY ni "∋"> <!-- U+220B ISOtech - contains as member --><!ENTITY prod "∏"> <!-- U+220F ISOamsb - n-ary product = product sign --><!ENTITY sum "∑"> <!-- U+2211 ISOamsb - n-ary sumation --><!ENTITY minus "−"> <!-- U+2212 ISOtech - minus sign --><!ENTITY lowast "∗"> <!-- U+2217 ISOtech - asterisk operator --><!ENTITY radic "√"> <!-- U+221A ISOtech - square root = radical sign --><!ENTITY prop "∝"> <!-- U+221D ISOtech - proportional to --><!ENTITY infin "∞"> <!-- U+221E ISOtech - infinity --><!ENTITY ang "∠"> <!-- U+2220 ISOamso - angle --><!ENTITY and "∧"> <!-- U+2227 ISOtech - logical and = wedge --><!ENTITY or "∨"> <!-- U+2228 ISOtech - logical or = vee --><!ENTITY cap "∩"> <!-- U+2229 ISOtech - intersection = cap --><!ENTITY cup "∪"> <!-- U+222A ISOtech - union = cup --><!ENTITY int "∫"> <!-- U+222B ISOtech - integral --><!ENTITY there4 "∴"> <!-- U+2234 ISOtech - therefore --><!ENTITY sim "∼"> <!-- U+223C ISOtech - tilde operator = varies with = similar to --><!ENTITY cong "≅"> <!-- U+2245 ISOtech - approximately equal to --><!ENTITY asymp "≈"> <!-- U+2248 ISOamsr - almost equal to = asymptotic to --><!ENTITY ne "≠"> <!-- U+2260 ISOtech - not equal to --><!ENTITY equiv "≡"> <!-- U+2261 ISOtech - identical to --><!ENTITY le "≤"> <!-- U+2264 ISOtech - less-than or equal to --><!ENTITY ge "≥"> <!-- U+2265 ISOtech - greater-than or equal to --><!ENTITY sub "⊂"> <!-- U+2282 ISOtech - subset of --><!ENTITY sup "⊃"> <!-- U+2283 ISOtech - superset of --><!ENTITY nsub "⊄"> <!-- U+2284 ISOamsn - not a subset of --><!ENTITY sube "⊆"> <!-- U+2286 ISOtech - subset of or equal to --><!ENTITY supe "⊇"> <!-- U+2287 ISOtech - superset of or equal to --><!ENTITY oplus "⊕"> <!-- U+2295 ISOamsb - circled plus = direct sum --><!ENTITY otimes "⊗"> <!-- U+2297 ISOamsb - circled times = vector product --><!ENTITY perp "⊥"> <!-- U+22A5 ISOtech - up tack = orthogonal to = perpendicular --><!ENTITY sdot "⋅"> <!-- U+22C5 ISOamsb - dot operator --><!-- Miscellaneous Technical --><!ENTITY lceil "⌈"> <!-- U+2308 ISOamsc - left ceiling = apl upstile --><!ENTITY rceil "⌉"> <!-- U+2309 ISOamsc - right ceiling --><!ENTITY lfloor "⌊"> <!-- U+230A ISOamsc - left floor = apl downstile --><!ENTITY rfloor "⌋"> <!-- U+230B ISOamsc - right floor --><!ENTITY lang "〈"> <!-- U+2329 ISOtech - left-pointing angle bracket = bra --><!ENTITY rang "〉"> <!-- U+232A ISOtech - right-pointing angle bracket = ket --><!-- Geometric Shapes --><!ENTITY loz "◊"> <!-- U+25CA ISOpub - lozenge --><!-- Miscellaneous Symbols --><!ENTITY spades "♠"> <!-- U+2660 ISOpub - black spade suit --><!ENTITY clubs "♣"> <!-- U+2663 ISOpub - black club suit = shamrock --><!ENTITY hearts "♥"> <!-- U+2665 ISOpub - black heart suit = valentine --><!ENTITY diams "♦"> <!-- U+2666 ISOpub - black diamond suit --><!-- CVS $Revision: 1.1 $ $Date: 2002/02/13 19:49:41 $ --><!-- Portions (C) International Organization for Standardization 1986 Permission to copy in any form is granted for use with conforming SGML systems and applications as defined in ISO 8879, provided this notice is included in all copies. -->?? 快捷鍵說明
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