| "\\underbrace" -> LITERAL (TEX_ONLY "\\underbrace ")
| "\\overleftarrow" -> LITERAL (TEX_ONLY "\\overleftarrow ")
| "\\overrightarrow" -> LITERAL (TEX_ONLY "\\overrightarrow ")
- | "\\overleftrightarrow"->LITERAL (TEX_ONLY "\\overleftrightarrow ")
+ | "\\overleftrightarrow"-> (tex_use_ams(); LITERAL (TEX_ONLY "\\overleftrightarrow "))
| "\\check" -> FUN_AR1 "\\check "
| "\\acute" -> FUN_AR1 "\\acute "
| "\\grave" -> FUN_AR1 "\\grave "
| "\\vbox" -> raise (Failure "malformatted \\vbox")
| "\\hbox" -> raise (Failure "malformatted \\hbox")
| "\\color" -> (tex_use_color (); LITERAL (TEX_ONLY "\\color"))
+ | "\\pagecolor" -> (tex_use_color (); LITERAL (TEX_ONLY "\\pagecolor"))
+ | "\\definecolor" -> (tex_use_color (); LITERAL (TEX_ONLY "\\definecolor"))
| s -> raise (Illegal_tex_function s)