b'\n_START_ARTICLE_\nTors (\xc4\xa3eometrija)\n_START_SECTION_\nTora parametriskais vien\xc4\x81dojums\n_START_PARAGRAPH_\n\\left\\{_NEWLINE_\\begin{matrix}_NEWLINE_x(\\phi,\\psi) = & (R + r \\cos \\phi) \\cos \\psi \\\\_NEWLINE_y(\\phi,\\psi) = & (R + r \\cos \\phi) \\sin \\psi \\\\_NEWLINE_z(\\phi,\\psi) = & r \\sin \\phi \\\\_NEWLINE_\\end{matrix}_NEWLINE_\\right._NEWLINE_\\qquad \\phi, \\psi \\in [0,2\\pi)_NEWLINE_R \xe2\x80\x94 att\xc4\x81lums no ri\xc5\x86\xc4\xb7a centra l\xc4\xabdz rot\xc4\x81cijas asij, r \xe2\x80\x94 ri\xc5\x86\xc4\xb7a r\xc4\x81diuss.\n_START_SECTION_\nTors topolo\xc4\xa3ij\xc4\x81\n_START_PARAGRAPH_\nTopolo\xc4\xa3ij\xc4\x81 toru defin\xc4\x93 k\xc4\x81 divu ri\xc5\x86\xc4\xb7u topolo\xc4\xa3isko reizin\xc4\x81jumu:_NEWLINE_S^1\\times S^1.'