eISSN 0454-8124
pISSN 1225-6951
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Fig. 1.
Sannia ruled surfaces associated with tangent ruled surface with
s
∈
−
1
,
3
and
v
∈
−
1
,
1
Kyungpook Mathematical Journal 2022;62:509~531
https://doi.org/10.5666/KMJ.2022.62.3.509
© KYUNGPOOK Math. J.
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Kyungpook Mathematical Journal
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