如何判断常微分方程的解数

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select * from tbl_Articles WHERE ArticleID=309799 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=309799 LIMIT 0,1
select * from tbl_Articles_sphinx where id=309799 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(4173329,4173328,4173317,4173316,4173154,4173152,4173149,4173148,4173108,4173107,4171466,4171465,4171464,4171463,4171462,4171461,4171460,4171459,4171458,4167535,4167534,4167533,4167532,4167531,4167530,4167529,4165767,4165684,4165652,4165651) ORDER BY field (ArticleID,4173329,4173328,4173317,4173316,4173154,4173152,4173149,4173148,4173108,4173107,4171466,4171465,4171464,4171463,4171462,4171461,4171460,4171459,4171458,4167535,4167534,4167533,4167532,4167531,4167530,4167529,4165767,4165684,4165652,4165651)