Empty set - kuushūgō (English spelling) empty set, void set

Japanese: 空集合 - くうしゅうごう（英語表記）empty set, void set
Empty set - kuushūgō (English spelling) empty set, void set
A set that does not contain any elements is called the empty set and is represented by the symbol ∅. If a point on a plane is represented by coordinates ( x , y ), and the set M is M = {( x , y ) | x2 + y2 < r }, then if r < 0, M has no elements. In other words, M = ∅. The empty set is a subset of all sets.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
元（要素）を一つも含まない集合を空集合といい，記号∅で表す。平面上の点を座標（x，y）で表し，集合 M を M＝｛（x，y）｜x2＋y2＜r｝とするとき，もし r＜0 であれば，Mは元をもたない。すなわち M＝∅ である。空集合はすべての集合の部分集合である。

出典　ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について　情報

<<:  National Liaison Conference of Associations for Recording Air Raids and War Damage - National Liaison Conference of Associations for Recording Air Raids and War Damage

>>:  Corner state - Gushu

Recommend

Procavia capensis (English spelling) Procavia capensis

…[Tadaaki Imaizumi]. … *Some of the terminology t...

Compressibility

…The higher the bulk modulus, the harder the mate...

Thomas Middleton

English playwright. Born in London. He studied at...

Egner, T.

… [Other European countries] In the Netherlands, ...

Crocodile River

…Its total length is 1,770 km (7th largest in Afr...

Potassium silver cyanide

The correct name is potassium dicyanoargentate(I)...

Pteromys volans (English spelling) Pteromysvolans

…[Yoshiharu Imaizumi]. … *Some of the terminology...

International Association of Hydrological Sciences

...The field of research into hydrological cycles...

Many Passions and Many Hatreds

[1] [noun] (adjective) Being sensitive and full of...

Aluminosilicate (Aluminosilicate)

A salt formed when some of the silicon in silicate...

Russell, Jene

...He was called the "Hollywood Casanova&quo...

Rhododendron reticulatum (English spelling) Rhododendronreticulatum

…[Yoshiharu Iijima]. … *Some of the terms mention...

Achalinus werneri (English spelling) Achalinuswerneri

… [Takahiro Matsui]. … *Some of the terminology t...

Ornithogalum sandelsiae - Ornithogalum sandelsiae

...The flowers are mostly white, with thick petal...

Mitsukuri Genpo - Mitsukuri Genpo

Year of death: Bunkyu 3.6.17 (1863.8.1) Year of bi...