In section "Connection with Sato theory" of webpage scholarpedia they discussed that KP equation can be derived from taking a pseudo-differential operator $L$ and consider the differential equation $dL/dt_m=[(L^m)_{+},L]$. So how did this carried out? Especially what's the relationship between $L$ and $u$?
2026-03-25 06:05:02.1774418702
How did (2+1) KP equation derived from Sato theory?
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