Characteristic equations of first-order linear partial differential equations
2015 ◽
pp. 1-47
2020 ◽
pp. 1-48
1981 ◽
Vol 128
(1)
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pp. 325-340
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2003 ◽
Vol 2
(2)
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pp. 211-231
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2021 ◽
Vol 1730
(1)
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pp. 012066
2001 ◽
Vol 37
(4)
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pp. 579-614
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2015 ◽
pp. 49-98
1999 ◽
Vol 35
(6)
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pp. 893-919
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