1

I can't understand the behavior of the code snippet below

\documentclass[letterpaper, 10 pt, conference]{ieeeconf}  
\begin{document}
\subsubsection{stiffness} %--> There is no colon here!
\end{document}

which generates

enter image description here

Where does the superfluous colon, at the end of my \subsubsection title, come from?

Here is the log file corresponding to the compilation above.

This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.6960 64-bit) (preloaded format=pdflatex 2019.2.4)  17 SEP 2019 21:15
entering extended mode
**./root.tex
(root.tex
LaTeX2e <2018-12-01>
(IEEEconf.cls

Document Class: IEEEconf 2009/04/05 v1.4 IEEE Computer Society 8.5x11" conference proceedings
\@IEEEtrantmpdimenA=\dimen102
\@IEEEtrantmpdimenB=\dimen103
\@IEEEtrantmpcountA=\count80
\@IEEEtrantmpcountB=\count81
\@IEEEtrantmptoksA=\toks14
LaTeX Font Info:    Try loading font information for OT1+ptm on input line 794.

("C:\Program Files\MiKTeX 2.9\tex/latex/psnfss\ot1ptm.fd"
File: ot1ptm.fd 2001/06/04 font definitions for OT1/ptm.
)
\@IEEEnormalsizefontbaselineskip=\skip41

-- This is a 10 point document.
\normalsizebaselineskip=\skip42
\normaljot=\skip43
LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <5> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <5> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <7> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <7> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <8> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <8> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <9> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <9> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <10> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <10> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <11> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <11> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <12> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <12> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <16> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <16> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <20> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <20> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

LaTeX Font Info:    Font shape `OT1/ptm/bx/n' in size <24> not available
(Font)              Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info:    Font shape `OT1/ptm/bx/it' in size <24> not available
(Font)              Font shape `OT1/ptm/b/it' tried instead on input line 1113.

\IEEEilabelindentA=\dimen104
\IEEEilabelindentB=\dimen105
\IEEEilabelindent=\dimen106
\IEEEelabelindent=\dimen107
\IEEEdlabelindent=\dimen108
\labelindent=\dimen109
\IEEEiednormlabelsep=\dimen110
\IEEEiedmathlabelsep=\dimen111
\IEEEiedtopsep=\skip44
\c@section=\count82
\c@subsection=\count83
\c@subsubsection=\count84
\c@paragraph=\count85
\c@IEEEsubequation=\count86
\abovecaptionskip=\skip45
\belowcaptionskip=\skip46
\c@figure=\count87
\c@table=\count88
\@IEEEeqnnumcols=\count89
\@IEEEeqncolcnt=\count90
\@IEEEtmpitemindent=\dimen112
\c@biography=\count91
\@IEEEtranrubishbin=\box27
) (root.aux)
\openout1 = `root.aux'.

LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.


** Conference Paper **
Before submitting the final camera ready copy, remember to:

 1. Manually equalize the lengths of two columns on the last page
 of your paper;

 2. Ensure that any PostScript and/or PDF output post-processing
 uses only Type 1 fonts and that every step in the generation
 process uses the US letter (8.5in X 11in) paper size.

[1

{C:/Users/.../AppData/Local/MiKTeX/2.9/pdftex/config/pdftex.map}

]
(root.aux) ) 
Here is how much of TeX's memory you used:
 779 strings out of 492946
 13196 string characters out of 3135516
 71718 words of memory out of 3000000
 4758 multiletter control sequences out of 15000+200000
 25846 words of font info for 55 fonts, out of 3000000 for 9000
 1141 hyphenation exceptions out of 8191
 26i,4n,19p,254b,105s stack positions out of 5000i,500n,10000p,200000b,50000s
{C:/Program Files/MiKTeX 2.9/fonts/enc/dvips/base/8r.enc}<C:/Progra
m Files/MiKTeX 2.9/fonts/type1/urw/times/utmri8a.pfb>
Output written on root.pdf (1 page, 9150 bytes).
PDF statistics:
 11 PDF objects out of 1000 (max. 8388607)
 0 named destinations out of 1000 (max. 500000)
 1 words of extra memory for PDF output out of 10000 (max. 10000000)

PS. 1 The output above is a pdfLaTeX's touch, yet XeLaTeX's result is also the same.

PS. 2 I'm using MikTeX 2.9.6972 on a Windows-10 machine.

PS. 3 One reproduces the same result by substituting ieeeconf with IEEEconf (Document Class: IEEEconf 2009/04/05 v1.4 IEEE Computer Society 8.5x11" conference proceedings).

  • texlive doesn't have an ieeeconf.cls it does have IEEEconf.cls but that does not have a [conference] option and produces no colon on your test file if I uppercase IEEE (and produces a warning about the unknown option) (it adds a full stop after the heading not a colon) It is an inline heading designed to be set as the start of the following paragraph. – David Carlisle Sep 17 '19 at 19:13
  • 1
    @DavidCarlisle: I added a 3rd postscript stating that I get the same problematic output by even using IEEEconf.cls instead of ieeeconf.cls. – Roboticist Sep 17 '19 at 19:18
  • texlive has Document Class: IEEEconf 2009/04/05 v1.4 IEEE Computer Society 8.5x11" conference proceedings which produces a full stop not a colon (and has no conference option) which version do you have? – David Carlisle Sep 17 '19 at 19:20
  • @DavidCarlisle: The version of the one I'm using is the same as you quoted above. – Roboticist Sep 17 '19 at 19:24
  • 2
    you have a local file IEEEconf.cls that is not the same as the one on ctan (which does not have that ensure that any... text: anorien.csc.warwick.ac.uk/mirrors/CTAN/macros/latex/contrib/… – David Carlisle Sep 17 '19 at 19:38

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