• 2022-06-19
    设函数[tex=2.857x1.357]Ueaj1W+sk248aoNsy2ALwQ==[/tex]有二阶连续偏导数且满足Laplace方程[tex=6.286x2.714]VGXzV15psxV0cBMwKVrVbsN3ktE0qyUwVqlrT40C2wHp1EuOwCqrUqEG84er7KQ1MJJCDvg9S+lBiPQUPjVCqwO7jYHJ0aRWPisTUEsJwOOC6JqQ4n3GYCwMRqeGy6nc[/tex].证明,作变量替换[tex=8.714x1.214]9R0KL1zyy3t6cAmzEkgRsKpmFV+3xBtBiS7ACUADsk6fn1Q+LDuMS8biOIJAdKaa[/tex]后,[tex=0.643x0.786]cnVwa8IjZzNSEmAUXJ8VCQ==[/tex]依然满足关于[tex=1.286x1.143]IVrDU3DmgojKEakj17JXmg==[/tex]的Laplace方程[tex=6.286x2.5]VGXzV15psxV0cBMwKVrVbsN3ktE0qyUwVqlrT40C2wHw6VVkJemgkNZvKU96yA5GJVaEUhKnGf5peOVzS5QGCo1iLiiia4WtLxzRtTU6oiA6HS314wc82ZHeo9Ixtm63[/tex].