Bonaventura Francesco Cavalieri (Latin: Bonaventura Cavalerius; 1598 – 30 November 1647) was an Italian mathematician and a Jesuate. He is known for his work on the problems of optics and motion, work on indivisibles, the precursors of infinitesimal calculus, and the introduction of logarithms to Italy.

1598

Milan, Italy

The plus–minus sign (also, plus or minus sign), ±, is a mathematical symbol with multiple meanings. In mathematics, it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction.

The at sign, @, is normally read aloud as “at”; it is also commonly called the at symbol, commercial at or address sign.

The equals sign (British English, Unicode Consortium) or equal sign (American English), formerly known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense.

not-equal-to operator

Symbols can be used as identifiers. In some programming languages, they are called atoms. Uniqueness is enforced by holding them in a symbol table….Support.

The symbol used to say when items are not equal is “≠” (slashed equal sign). There are several symbols that can be used to say items are “approximately the same,” “similar to” or “about equal.” Some of these symbols include: “≈” (two tildes or wavy lines, often used for “approximately equal”)

The symbol ≈ means approximately equal to.

The ampersand, also known as the and sign, is the logogram &, representing the conjunction “and”. It originated as a ligature of the letters et—Latin for “and”.

A symbol is anything that stands for, or represents, some- thing else. In a story, a character, an action, an object, or an animal can be symbolic. Often these symbols stand for something abstract, like a force of nature, a condition of the world, or an idea.

These { } have a variety of names; they are called braces, curly brackets, or squiggly brackets.

:/ – displeased or skeptical face. <:0) – clown face. 🙁 – sad face.

Those three little dots are called an ellipsis (plural: ellipses). The term ellipsis comes from the Greek word meaning “omission,” and that’s just what an ellipsis does—it shows that something has been left out.

A comma (,) signifies a short pause in a sentence. It can also divide clauses (“parts of a sentence”) or items in a list. And, it is often used to create division or to improve the clarity of a sentence. Clearly, a comma has many roles as a punctuation mark.

Commas (Eight Basic Uses)

• Use a comma to separate independent clauses.
• Use a comma after an introductory clause or phrase.
• Use a comma between all items in a series.
• Use commas to set off nonrestrictive clauses.
• Use a comma to set off appositives.
• Use a comma to indicate direct address.
• Use commas to set off direct quotations.

Commas separate two parts of a sentence, so a comma tattoo could imply that the owner has separated from someone or some other type of separation has affected their lives. Since most comma tattoos are smaller, it can be placed inside of other tattoos to keep the “separation” meaning a bit more private to the owner.

Commas don’t just signify pauses in a sentence — precise rules govern when to use this punctuation mark. Commas are needed before coordinating conjunctions, after dependent clauses (when they precede independent clauses), and to set off appositives. The Oxford comma reduces ambiguity in lists.

The word and is a conjunction, and when a conjunction joins two independent clauses, you should use a comma with it. The proper place for the comma is before the conjunction. On Monday we’ll see the Eiffel Tower, and on Tuesday we’ll visit the Louvre.

Ending a sentence with a preposition such as “with,” “of,” and “to,” is permissible in the English language.