<!-- (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.
-->
<!-- Character entity set. Typical invocation:
     <!ENTITY % ISOtech PUBLIC
       "ISO 8879-1986//ENTITIES General Technical//EN" "iso-tech.ent">
     %ISOtech;
-->
<!ENTITY aleph  SDATA "font=symbol charset=fontspecific code=192
			descr='[aleph]'"--/aleph =aleph, Hebrew-->
<!ENTITY and    SDATA "font=symbol charset=fontspecific code=217 
			descr='[and]'"--/wedge /land B: =logical and-->
<!ENTITY ap     SDATA "font=symbol charset=fontspecific code=64  
			descr='[ap]'"--/approx R: =approximate-->
<!ENTITY bottom SDATA "font=symbol charset=fontspecific code=94  
			descr='[bottom]'"--/bot B: =perpendicular-->
<!ENTITY cap    SDATA "font=symbol charset=fontspecific code=199 
			descr='[cap]'"--/cap B: =intersection-->
<!ENTITY cong   SDATA "font=symbol charset=fontspecific code=64
			descr='[cong]'"--/cong R: =congruent with-->
<!ENTITY cup    SDATA "font=symbol charset=fontspecific code=200 
			descr='[cup]'"--/cup B: =union or logical sum-->
<!ENTITY equiv  SDATA "font=symbol charset=fontspecific code=186
			descr='[equiv]'"--/equiv R: =identical with-->
<!ENTITY exist  SDATA "font=symbol charset=fontspecific code=36  
	TeX='\exists ' descr='[exist]'"--/exists =at least one exists-->
<!ENTITY forall SDATA "font=symbol charset=fontspecific code=34  
	TeX='\forall ' descr='[forall]'"--/forall =for all-->
<!ENTITY fnof   SDATA "font=symbol charset=fontspecific code=166 
			descr='[fnof]'"--=function of (italic small f)-->
<!ENTITY ge     SDATA "font=symbol charset=fontspecific code=179 
	TeX='\geq ' descr='[ge]'"--/geq /ge R: =greater-than-or-equal-->
<!ENTITY iff    SDATA "TeX='\Leftrightarrow ' descr='[iff]'"
	--/iff =if and only if-->
<!ENTITY infin  SDATA "font=symbol charset=fontspecific code=165 
	TeX='\infty ' descr='[infin]'"--/infty =infinity-->
<!ENTITY int    SDATA "font=symbol charset=fontspecific code=242 
			descr='[int]'"--/int L: =integral operator-->
<!ENTITY isin   SDATA "font=symbol charset=fontspecific code=206
			descr='[isin]'"--/in R: =set membership-->
<!ENTITY lang   SDATA "font=symbol charset=fontspecific code=225 
			descr='[lang]'"--/langle O: =left angle bracket-->
<!ENTITY lArr   SDATA "font=symbol charset=fontspecific code=172 
			descr='[lArr]'"--/Leftarrow A: =is implied by-->
<!ENTITY le     SDATA "font=symbol charset=fontspecific code=163 
	TeX='\leq ' descr='[le]'"--/leq /le R: =less-than-or-equal-->
<!ENTITY minus  "-"	--B: =minus sign-->
<!ENTITY nabla  SDATA "font=symbol charset=fontspecific code=209
	TeX='\nabla ' descr='[nabla]'"--/nabla =del, Hamilton operator-->
<!ENTITY ne     SDATA "font=symbol charset=fontspecific code=185 
	TeX='\ne ' descr='[ne]'"--/ne /neq R: =not equal-->
<!ENTITY notin  SDATA "font=symbol charset=fontspecific code=207
			descr='[notin]'"--N: negated set membership-->
<!ENTITY or     SDATA "font=symbol charset=fontspecific code=218 
			descr='[or]'"--/vee /lor B: =logical or-->
<!ENTITY par    SDATA "TeX='\| ' descr='[par]'"--/parallel R: =parallel-->
<!ENTITY part   SDATA "font=symbol charset=fontspecific code=182
			descr='[part]'"--/partial =partial differential-->
<!ENTITY perp   SDATA "font=symbol charset=fontspecific code=94  
	TeX='\bot ' descr='[perp]'"--/perp R: =perpendicular-->
<!ENTITY prime  SDATA "font=symbol charset=fontspecific code=162 
	TeX='\prime ' descr='[prime]'"--/prime =prime or minute-->
<!ENTITY Prime  SDATA "font=symbol charset=fontspecific code=178 
			descr='[Prime]'"--=double prime or second-->
<!ENTITY prop   SDATA "font=symbol charset=fontspecific code=181
			descr='[prop]'"--/propto R: =is proportional to-->
<!ENTITY radic  SDATA "font=symbol charset=fontspecific code=214 
			descr='[radic]'"--/surd =radical-->
<!ENTITY rang   SDATA "font=symbol charset=fontspecific code=241 
			descr='[rang]'"--/rangle C: =right angle bracket-->
<!ENTITY rArr   SDATA "font=symbol charset=fontspecific code=174 
			descr='[rArr]'"--/Rightarrow A: =implies-->
<!ENTITY sim    "~"--/sim R: =similar-->
 <!ENTITY sub    SDATA "font=symbol charset=fontspecific code=204 
			descr='[sub]'"--/subset R: =subset or is implied by-->
<!ENTITY sube   SDATA "font=symbol charset=fontspecific code=205 
			descr='[sube]'"--/subseteq R: =subset, equals-->
<!ENTITY sup    SDATA "font=symbol charset=fontspecific code=201 
			descr='[sup]'"--/supset R: =superset or implies-->
<!ENTITY supe   SDATA "font=symbol charset=fontspecific code=202 
			descr='[supe]'"--/supseteq R: =superset, equals-->
<!ENTITY there4 SDATA "font=symbol charset=fontspecific code=92  
			descr='[there4]'"--/therefore R: =therefore-->

<!ENTITY angst  "&#197;"	--Angstrom =capital A, ring-->
<!ENTITY Dot    "&#168;"	--=dieresis or umlaut mark-->
 
<!-- The following characters could not be defined using commonly available
fonts. Therefore, EBT is using placeholders for these characters. To include
the placeholders in your document, make sure that the marked section below has
the keyword "INCLUDE".

To ignore the placeholders, use the keyword "IGNORE". If you are ignoring this
marked section and your SGML document references any of the entities declared
below, you will get (non-fatal) mkbook errors, and the entity references will
not be replaced.

Finally, you may choose to define the entities below yourself, using a special
font that will be available to readers of your DynaText books. Use the same
SDATA entity declaration model as is used above, substituting the appropriate
names and decimal numbers for font, charset, code, and descr. In that case, you
should INCLUDE the marked section. 

See Chapter 7 of Publisher Guide, Volume 1 for more information. -->

<![ INCLUDE [
<!ENTITY ang90  "[ang90]"--=right (90 degree) angle-->
<!ENTITY angsph "[angsph]"--/sphericalangle =angle-spherical-->
<!ENTITY becaus "[becaus]"--/because R: =because-->
<!ENTITY conint "[conint]"--/oint L: =contour integral operator-->
<!ENTITY mnplus "[mnplus]"--/mp B: =minus-or-plus sign-->
<!ENTITY ni     "[ni]"--/ni /owns R: =contains-->
<!ENTITY permil "[permil]"--=per thousand-->
<!ENTITY sime   "[sime]"--/simeq R: =similar, equals-->
<!ENTITY square "[square]"--/square B: =square-->
<!ENTITY Verbar "[Verbar]"--/Vert =dbl vertical bar-->
<!ENTITY bernou "[bernou]"--Bernoulli function (script capital B)-->
<!ENTITY compfn "[compfn]"--B: composite function (small circle)-->
<!ENTITY DotDot "[DotDot]"--four dots above-->
<!ENTITY hamilt "[hamilt]"--Hamiltonian (script capital H)-->
<!ENTITY lagran "[lagran]"--Lagrangian (script capital L)-->
<!ENTITY lowast "[lowast]"--low asterisk-->
<!ENTITY order  "[order]"--order of (script small o)-->
<!ENTITY phmmat "[phmmat]"--physics M-matrix (script capital M)-->
<!ENTITY tdot   "[tdot]"--three dots above-->
<!ENTITY tprime "[tprime]"--triple prime-->
<!ENTITY wedgeq "[wedgeq]"--R: corresponds to (wedge, equals)-->
]]>


