The conformal factor and a central extension of a formal loop group with values in ${\rm PSL}(2,{\bf R})$
1994 ◽
Vol 160
(1)
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pp. 15-31
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1988 ◽
Vol 116
(1)
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pp. 73-80
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2018 ◽
Vol 30
(06)
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pp. 1840001
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1991 ◽
Vol 06
(29)
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pp. 5215-5229
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1996 ◽
Vol 61
(2)
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pp. 258-266
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2000 ◽
Vol 159
◽
pp. 113-124
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2003 ◽
Vol 44
(11)
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pp. 5450-5455
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Keyword(s):
Keyword(s):