427214
[Commentary:
General notation for triangular numbers.
See also page 2 of the 'Magisteria' (Add MS f. ). ]
See also page 2 of the 'Magisteria' (Add MS f. ). ]
3a notatio triangularium per notas
[Translation: 3rd notation for triangular numbers, in general ]
[Translation: 3rd notation for triangular numbers, in general ]