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Differential equations without solutions. (English) Zbl 0093.28903


MSC:

35-XX Partial differential equations

Citations:

Zbl 0090.08101
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References:

[1] Hörmander, L.: Differential operators of principal type. Math. Ann.140, 124-146 (1960). · Zbl 0090.08101 · doi:10.1007/BF01360085
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