Fritz John pp 360-364 | Cite as

Commentary on [16 ], [23] and [41]

  • Lars Hörmander
Part of the Contemporary Mathematicians book series (CM)


Holmgren’s proof of the uniquesness theorem for solutions of differential equations with analytical coefficients (in two variables) remained a rather isolated fact for half a century. However, the paper [23] by Fritz John, partly announced in [16], brought the proof to a central place in the theory of analytic differential equations by showing how old and new theorems on analyticity of solutions could be obtained from it. The importance of this connection is undiminished today, but the relationships have been reversed during the past decade so that analyticity theorems now come first and uniqueness theorems come second.


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© Springer Science+Business Media New York 1985

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  • Lars Hörmander

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