関武夫さんという自然を愛している方が生前持っていた森を、ご遺族の方が（財）埼玉県生態系保護協会に寄付したんですね。 In nineteenth century Europe, there was mathematical and philosophical dialogue about the exact mother nature of your natural figures. Henri Poincaré said that axioms can only be demonstrated of their finite application, and concluded that it's "the power of the intellect... https://diigo.com/010idmi