Authors composing entries for the SEP sometimes need to make use of special symbols which are not found in the standard ASCII character set. Many of these special symbols are now widely supported in web browsers such as Firefox, Safari, Internet Explorer, etc. We have done some testing and have established the a list of "safe" symbols which you can find at the following link:

Widely Supported HTML4 and Unicode Characters

For those symbols which are not widely supported, authors should use the following graphic images of the characters:

Special Symbols Not Widely Supported

Logical Symbols

Symbol	Name	Symbol	Name	Symbol	Name
	models.gif		not-models.gif		proves.gif
	not-proves.gif		perp.gif		top.gif
	Leftarrow.gif		fishhook.jpg		vertical-bar11.gif
	langl11.jpg		rangl11.jpg		cong.jpg
	calM.jpg		calS.jpg		calF.jpg
	l-corner-quote.gif		r-corner-quote.gif		succ.jpg
	dproves.jpg		not-dproves.jpg		prec.jpg
	rhd.gif		varphi.jpg		succeq.jpg
	preceq.gif		therefore.gif

Mathematical Symbols

Symbol	Name	Symbol	Name	Symbol	Name
	not-in.jpg		bigcup.jpg		frak-A.jpg
	bigcap.gif		bigwedge.jpg		bigvee.jpg
	calP.jpg		aleph.jpg		real.gif
	Num.gif		otimes.jpg		mapsto.jpg
	circ.jpg		hbar.jpg		cdot.gif
	frak-I.jpg		calH.gif		bold-calR.gif
	calR.gif		calA.jpg		calB.jpg
	nearrow.jpg		searrow.jpg		Re.jpg
	nwarrow.jpg		swarrow.jpg		calC.jpg

Note: Authors who need other special symbols for their entry should send email to the Editors.