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수학동아 - 폴리매스
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[잡담] sagemath사용법
디듀우 2019.01.14 18:14 조회 594
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

var('r') assume(r>0) integral(4*pi*(sqrt(x^2-r))^3/3,x,-r/2,r/2)

이 코드를 sagemath에 넣고 계산했더니 로딩하다가 에러창도 안뜨고 그냥 로딩이 멈춥니다. 답도 안 나옵니다. 로딩만 하다가 아무런 출력값이 없습니다. 왜일까요? 

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  •  
    TOPIARY Lv.1 2019.01.16 00:18

    저도 적분값구하다가 그래프 부분의 구간을 너무 길게 잡았다가 로딩이 안된적있어요

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  •  
    김우현 기자 Lv.5 2019.01.22 00:20

    연구원님의 한 마디!

    '무한루프' 라고 코딩에서 흔히 발생하는 문제예요. r을 0보다 크다고 가정했는데, 컴퓨터는 사람하고는 다르게 '적당히' 계산하는 것이 아니라서 명확하게 적분 구간을 지정해줘야 합니다.smiley

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