1, sign as a noun means "sign; Symbol; Mark; Gestures; Signboard. "

2. sign as a transitive verb means "sign"; Signal. "

3. sign as an intransitive verb means "sign"; Signature ".

In mathematical symbols, sign is also called sgn, which means symbol. Symbolic function (generally represented by symbol (X)) is a very useful function, which can help us realize some constructions that are difficult to realize directly in the geometric sketchpad.

Extended data

Usage of symbols

1, sign means "sign" when used as a noun, and can be interpreted as "signature" when converted into a verb. Generally speaking, sign can be interpreted as a "gesture" when it is used as a noun and a "gesture" when it is used as a verb, which means to express an intention with a gesture when it cannot be expressed in words or can not be communicated orally for some reason.

2.sign can be used as an intransitive verb or a transitive verb. When used as transitive verbs, nouns, pronouns and that clauses are used as objects, and infinitives can also be used as objects to supplement the compound objects of Li Qingyu.

3.sign can be used in passive structure when it is interpreted as "signature, signature", but not in passive structure when it is interpreted as "signal, gesture".