Archimedes' spiral

Japanese: Archimedes' spiral(英語表記)Archimedesspiral
Archimedes' spiral

…(8) A curve expressed by r = f (θ) ( f is monotonic) using polar coordinates is generally called a spiral, a spiral, etc. In particular, curves expressed by r = , r = aebθ , r = a /θ ( a and b are constants) are called Archimedes' spiral, logarithmic spiral, and hyperbolic spiral , respectively (Figure 21). If we set it as such, the curve expressed with t as a parameter is called Cornu's spiral or clothoid (Figure 22). …

*Some of the terminology that mentions "Archimedes' spiral" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…(8)極座標を用いてrf(θ)(fは単調)で表されるような曲線を一般に螺線,スパイラルspiral,渦巻線などと呼ぶ。とくに,raθ,raebθ,ra/θ(a,bは定数)で表される曲線をそれぞれアルキメデスの螺線Archimedes’ spiral,対数螺線logarithmic spiral(等角螺線equiangular spiral),双曲螺線hyperbolic spiralという(図21)。とおくとき,tを媒介変数として,で表される曲線をコルニュの螺線Cornu’s spiralまたはクロソイドclothoidという(図22)。…

※「Archimedes' spiral」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

<<:  Archipelagic apron (English spelling)

>>:  Archimedes' axiom (English spelling)

Recommend

Wastewater treatment - Wastewater treatment

The process of removing harmful and polluting subs...

Uvsa Nor [Lake] - Uvsa Nor

…An inland lake in the northwest of the Mongolian...

University of Leuven - Leuven University

A private, coeducational Catholic university in Le...

The tune of thread

Jiuta utahon. Among the utahon from Osaka after th...

《Doctor's Religion》 - Ishi no Shukyo

…His sonorous Latin rhythm is unparalleled, and h...

berdikari

…Official name: Republic of IndonesiaArea: 1,904,...

Ader, C. (English spelling) AderC

…This was the path to perfection that researchers...

Porphyria

… There are various hereditary diseases that are ...

Three-piece set of armor - Mitsugusoku

A general term for a set of a flower vase (kebyo),...

Malunion - Henkeiichiyu (English spelling)

This refers to a condition in which a fracture hea...

Inbreeding - Kinshintouta

...Two concepts have been proposed to explain the...

Asana (English spelling) āsana

A term in Indian philosophy. A sitting position. O...

penduline tit

…There are six species in Africa, one in Europe a...

Shinto monument (English: shen dào bēi)

A genre of Chinese writing. A piece of writing ins...

Menotti - Gian Carlo Menotti

Italian-born composer. After studying at the Mila...