39 lines
739 B
TeX
39 lines
739 B
TeX
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\documentclass{minimal}
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\usepackage{pstricks}
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\pagestyle{empty}
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\begin{document}
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\begin{pspicture}(0,6)(8,22)
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\usefont{T1}{ppl}{m}{n}
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\rput(3,20){Edinburgh LCF}
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\rput(3,18){Cambridge LCF}
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\rput(3,16){HOL88}
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\rput(1,14){hol90}
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\rput(5,13.5){ProofPower}
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\rput(5,14.5){Isabelle/HOL}
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\rput(3,12){HOL Light}
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\rput(1,10){hol98}
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\rput(5,10){HOL Zero}
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\rput(1,8){HOL4}
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\psline{->}(3,19.7)(3,18.3)
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\psline{->}(3,17.7)(3,16.3)
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\psline{->}(1,13.7)(1,10.3)
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\psline{->}(1,9.7)(1,8.3)
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\psline{->}(3,11.7)(1,10.3)
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\psline{->}(3,11.7)(5,10.3)
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\psline{->}(5,13.2)(5,10.3)
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\psline{->}(3,15.7)(3,12.3)
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\psline{->}(3,15.7)(1,14.3)
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\psline{->}(3,15.7)(3.8,14.5)
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\psline{->}(3,15.7)(3.8,13.5)
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\psline{->}(1,13.7)(3,12.3)
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\end{pspicture}
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\end{document}
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