| 31. | By the end of the 1890s Bukreev began to undertake research into differential geometry.
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| 32. | Principal bundles have important applications in topology and differential geometry.
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| 33. | Her Ph . D . thesis was in the area of projective differential geometry.
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| 34. | A treatise covering virtually every aspect of the 19th century differential geometry of surfaces.
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| 35. | For his contributions to differential geometry he was awarded an EMS Prize in 2012.
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| 36. | She wrote a history of vector-and tensor and differential geometry.
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| 37. | This way of expressing the metric was used by the pioneers of differential geometry.
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| 38. | Similar notions have found applications everywhere in differential geometry.
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| 39. | Instead methods from Discrete differential geometry are often used.
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| 40. | Each year Herman gave a course in differential geometry.
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