시간:14:45-15:45 " In 1997, Kaplansky conjectured that if two positive definite ternary quadratic forms with integer coefficients have perfectly identical integral representations, then they are isometric, both regular, or included either of two families of ternary quadratic forms. In this talk, we prove the existence of pairs of ternary quadratic forms representing the same integers which are not contained in Kaplansky`s list. Zoom Meeting ID: 830 9045 0287 Passcode: 246638 -서울대 중점연구소 지원