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十九世纪数学
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十九世纪数学
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理学
十九世纪数学
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mathematics in 19th century
十九世纪数学
19世纪是数学史上创造精神和严格精神高度发扬的时代。复变函数论的创立和分析学的严格化,非欧几里得几何的问世和射影几何的完善,群论和非交换代数的诞生,是这一世纪典型的数学成就。它们所蕴含的新思想,深刻地影响着20世纪的数学。
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crop disease
crop disease and pest disasters in China
crop diseases and insect pests
crop diseases in China
crop distribution
crop domestication
crop domestication and evolution
crop ecological adaptability
crop evapotranspiration experiment
crop farming
crop gene discovery
crop germplasm resources ex situ conservation
crop germplasm resourceson-farm conservation
crop germplasm sensitivity to environmental factors
crop growth condition monitoring by remote sensing
crop growth model
crop growth monitoring
crop growth simulation model
crop harvest
crop insect pests monitoring
crop introduction
cropland irrigation date forecast
cropland prataculture
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