Abstract (EN):
Consider a periodic function f of two variables with symmetry 1 and let L subset of Gamma 1 be the subgroup of translations. The Fourier expansion of a periodic function is a sum over L*; the dual of the set G of all the periods of f. After projecting f, some of its original symmetry remains. We describe the symmetries of the projected function, starting from Gamma and from the structure of L*.
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
9