scientific article; zbMATH DE number 3404689
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Publication:5670957
zbMath0256.34008MaRDI QIDQ5670957
Publication date: 1973
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Linear ordinary differential equations and systems (34A30) Theoretical approximation in context of PDEs (35A35) Linear first-order PDEs (35F05) Quadratic and bilinear forms, inner products (15A63)
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