### Works of ~~Michael Atiyah~~

#### Works connected to ~~Victor Anatolyevich Vassiliev~~

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The mathematical legacy of ‘Lacunas for hyperbolic differential equations’,”
pp. xxiii–xxviii
in
Raoul Bott: Collected papers,
vol. 2: Differential operators.
Edited by R. D. MacPherson.
Contemporary Mathematicians.
Birkhäuser (Boston, MA),
1994.
Commentary on two-part article published in *Acta Math.* **124** (1970) and *Acta Math.* **131** (1973).
MR
1290364
incollection