Discriminants of Casson–Gordon invariants
1992 ◽
Vol 112
(1)
◽
pp. 127-139
◽
Casson–Gordon invariants were first used to prove that certain algebraically slice knots in S3 are not slice knots [2, 3]. Since then they have been applied to a wide range of problems, including embedding problems and questions relating to boundary links [2, 10, 21, 25]. The most general Casson–Gordon invariant takes its value in L0(ℚ(ζd)(t)) ⊗ ℚ; here ζd denotes a primitive dth root of unity. Litherland [20] observed that one could usually tensor with ℤ(2) instead of ℚ, and in this way preserve the 2-torsion in the Witt group. He then constructed new examples of non-slice genus two knots which were detected with torsion classes in L0(ℚ(ζd)) ⊗ ℤ(2) modulo the image of L0(ℚ(ζd)) ⊗ ℤ(2).
1978 ◽
Vol 36
(3)
◽
pp. 470-482
◽
1983 ◽
Vol 41
◽
pp. 86-89
Keyword(s):
1974 ◽
Vol 32
◽
pp. 472-473
1977 ◽
Vol 35
◽
pp. 80-81
Keyword(s):
1988 ◽
Vol 46
◽
pp. 978-979
Keyword(s):
Comparison of Deterministic and Linear Cosine Spatial Filtering of Transmission Electron Micrographs
1972 ◽
Vol 30
◽
pp. 596-597
Keyword(s):
1976 ◽
Vol 34
◽
pp. 592-593
1991 ◽
Vol 49
◽
pp. 834-835
1978 ◽
Vol 36
(1)
◽
pp. 68-69