PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

Ptolemy, Almagesti (tr. Erasmus Reinhold)

Wittenberg, Johannes Lufft, 1549 · 114v

Facsimile

EBD reliquus. ltaque et AB circumferentia erit data.

His praemissis, Primum theorema sphaere κατὰ διαίρεσιν i. m. W describantur in superficie sphaerae maximorum circulorum circumferentiae, ita, ut in duas circumferentias AB et AG aliae duae inscriptae, scilicet, BE et GD secent se invicem in signo Z. Et sit quaelibet earum circumferentiarum minor semicirculo, id quod in omnibus similibus descriptionibus intelligendum est. Dico, quod ratio subtensae dupli circumferentiae GE ad subtensam dupli EA componitur ex ratione subtensae dupli GZ ad subtensam dupli ZD, et ex ratione subtensae dupli DB ad subtensam dupli BA. Adsumatur enim centrum sphaerae, et sit I, et a centro I ad sectiones circulorum B, Z, E, ducantur IB