Lorenzo Mascheroni ‘s portrait
Lorenzo Mascheroni was an Italian mathematician In his Adnotationes ad calculum integrale Euleri he published a calculation of what is now known as the Euler–Mascheroni constant, usually denoted as γ (gamma). In his “Geometria del Compasso” (Pavia, 1797), he proved that any geometrical construction which can be done with compass and straightedge, can also be done with compasses alone.
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