000 00641nam a2200157 a 4500
005 20220228110817.0
035 _aF8901000720656
084 _aIPN RI 243 1998
100 _aKarapetyants, Alexey N.
245 _aL-characteristic of some potential type operators with osci-llating symbols and singularities of the Kernels on a spher-e / by Alexey N. Karapetyants and Vladimir A. Nogin
260 _aMéxico : tamento de Matemáticas
300 _a11 p.
440 _aReporte interno ; 243 / Instituto Politécnico Nacional, CIN-VESTAV, Departamento de Matemáticas
690 _aOperadores (Algebra)
710 _aNogin, Vladimir A., coaut.
999 _c66308
_d66308