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[고등수학] 비유클리드 기하학의 발견
수학동아 2018.12.27 19:10 조회 1444
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

 

운동장에 직선을 그려 보자. 직선은 곡선과 달리 곧게 똑바로 그리면 된다. 이보다 더 긴 직선은 없을까? 고속도로의 차선을 생각해 보자. 얼마나 길고 곧게 뻗은 ‘직선’인가. 그런데 그 선을 비행기에서 내려다보면 사실은 굽은 선이다. 둥근 지구 위에는 선을 아무리 똑바로 그려도 굽을 수밖에 없기 때문이다. 이처럼 직선을 그릴 수 없는 공간을 생각하다 발견한 기하학이 있다. 바로 비유클리드 기하학이다.

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