What does the algebraic symbol mean, and what does the mathematical symbol mean?

Mathematical symbols were invented and used later than numbers, but in much greater numbers. There are more than 200 commonly used now, and there are no less than 20 kinds in junior high school math books. They all have an interesting experience.

For example, there used to be several kinds of plus signs, and now they are commonly used"+"Number.

The number is from Latin"et"（"with"meaning). In the sixteenth century, the Italian scientist Tataria used Italian"più"The first letter of (the meaning of plus) means to add, and the grass is"μ"In the end, it all became"+"Number.

The number is from Latin"minus"（"minus"meaning), abbreviated m, and then omit the letters, and it becomes"-"Finish.

It is also said that it is used by merchants who sell alcohol"-"Indicates how much wine was sold in the barrel. Later, when new sake is poured into the vats, it is there"-"Add a vertical on it, which means that the original line is written off, so that it becomes one"+"Number.

In the fifteenth century, the German mathematician Weidmei formalized:"+"Used as a plus sign,"-"Used as a minus sign.

There used to be more than a dozen kinds of multiplier signs, and now there are two kinds of common ones. One is"×", which was first proposed by the English mathematician Autter in 1631; One is"· "It was first pioneered by the British mathematician Heriott. The German mathematician Leibniz argued:

"The number is like the Latin alphabet"x", to be opposed, but in favor of"· "Number. He himself proposed to use it"п"Indicates multiplication. But this notation is now being applied to set theory.

In the eighteenth century, the American mathematician Audrey determined that the put"×"As a multiplier sign. He thinks"×"Yes"+"Written diagonally, it is another symbol that indicates an increase.

Originally used as a minus, it has long been popular on the European continent. It was not until 1631 that the English mathematician Auwart used"："Indicates division or ratio, and is used by others"-"(Divide) means divide.

Later, the Swiss mathematician Raha in his book "Algebra" was created according to the masses and officially will"÷"as a division sign.

The square root number used to be in Latin"radix"The combination of the first and last letters of (root) indicates that it was first used by the French mathematician Descartes in his Geometry in the early seventeenth century"√"Indicates the root number. "r"is made up of Latin word lines"r"Change,"--"It's a parentheses.

The sixteenth-century French mathematician Viet"="Indicates the difference between two quantities. However, Lecauld, a professor of mathematics and rhetoric at the University of Oxford, thought that it was most appropriate to use two parallel and equal straight lines to represent the equality of two numbers, so it was equal to symbols"="It has been in use since 1540.

In 1591, the French mathematician Veda used this symbol extensively in rhombus, and it was gradually accepted by people. It was widely used in Leibniz, Germany in the seventeenth century"="He also used it in geometry"∽"I show similarity and use it"≌"Indicates congruence.

Greater than sign"〉"and less than signs"〈"It was created by the famous English algebraist Herio in 1631. As for""≮"、"≠"The appearance of these three symbols was very late. Braces""and middle brackets"[ ]"It was created by Wei Zhide, one of the founders of algebra.

Distraction. The formula formed by connecting several formulas with conjunctions is called disjunction, and each component of this disjunction is called disjunction. Any disjunction consisting of a number of suitable formulas is also a suitable formula.

You will learn in discrete mathematics at university

People who have studied in college or have studied college courses on their own know that this is a connecting symbol for the expression of formulas in discrete mathematics, which is equivalent to a conjunction in Chinese. Its mathematical term is disjunction.

Definition of disjunction: Any disjunction consisting of some suitable formula is a formula formed by connecting several formulas with conjunctions. Each component of this disjunction is called an disjunctive term.

Some people also use it to mean "victory" because it is the first capital letter at the beginning of the English word. Although it is not an alphabet, the people are not too muddy.

Disjunction numbers in discrete mathematics It's a headache to think about.

Usually, V is also used to mean victory

1. " means: because.

2. " means: So.

3. " means: equal, proportional.

4. This is a math term.

5. " and " " " was first used by the Swiss mathematician Johann Rahn, who used two symbols to represent "so" in a mathematical book published in 1659 "Teusche Algebra", of which " is used more often.

There are three meanings in mathematics:

1) Indicates the power of the power. When entering mathematical formulas on a computer, this symbol is often used to represent the power because it is not convenient to enter the power. For example, the power of 2 to the 5th is usually represented as 2 5.

2) A symbol that denotes a logical operation.

Logical or intersectal operations If a is true and b is true, then proposition a b is true; Otherwise, it's false. n < 4 n >2 n = 3, when n is a natural number, it is a complex mathematical symbol. Sometimes it can also be labeled on a known function to define a transformed function.

3) In fuzzy mathematics, the symbol represents the "take small" operation, and vice versa represents the "take large" operation, i.e., for any a, b, there is

a∧b=min =0。

a∨b=max =1。

The most basic definition of power is: let a be a number, n be a positive integer, and the n power of a is represented as a, which represents the result of n a multiplication, such as 2 = 2 2 2 2 2 = 16. The definition of power can also be extended to the power of 0, to the power of minus, to the power of decimal numbers, to the power of irrational numbers, and even to the power of imaginary numbers.

When entering mathematical formulas on a computer, the symbol " " is often used to indicate the power because it is not convenient to enter the power. For example, the power of 2 to the 5th is usually represented as 2 5.

When m is a positive integer, n m means that the meaning of the formula is m and n multiplication. When m is a decimal, m can be written as a b (where a and b are integers), and n m means n a and then open b root number. When m is an imaginary number, it is necessary to use Euler's formula ei =cos +isin, and then use the logarithmic property to solve the problem.

1. " means: because.

2. " means: So.

3. " means: equal, proportional.

4. This is a math term.

5. " and " " " was first used by the Swiss mathematician Johann Rahn, who used two symbols to represent "so" in a mathematical book published in 1659 "Teusche Algebra", of which " is used more often.

Extended Materials. Math Symbols:

1. It is one of the earliest symbols used in the world in ancient times, which originated from the divination of the Shang Dynasty.

2. Most of the mathematical symbols we use today were invented only after the 16th century, when mathematics was written in words, a painstaking procedure that would limit the development of mathematics.

3. Today's symbols make mathematics more convenient for people to operate, but beginners often feel intimidated by this, it is extremely compressed, a small number of symbols contain a large number of family information, just like ** symbols, today's trillions of hand vertical symbols have a clear grammar and difficult to write in other ways of information encoding.

is a Greek letter, i.e. the uppercase form of , which in mathematics means a quadratic operation or a direct product operation.

Mathematical symbols were invented and used later than numbers, but their number has exceeded the number of mathematical symbols commonly used in modern mathematics has exceeded 200, and each of them has an interesting experience.

1. Usage: The initial value and the end value of the product are added up and down, for example, "i=1" can be written below the symbol and "n" above, which means that the i in the following quadratic formula is added from 1 to n.

2. Greek letters:

is a Greek letter, i.e. a capital form of , which in mathematics means a product operation or a direct product operation, and is formally similar to .

Lowercase: Pi is often referred to in mathematics. Pi, generally speaking, is a mathematical constant that is prevalent in mathematics and physics. It is defined as the ratio of the circumference to the diameter of a circle. It is also equal to the ratio of the area of the circle to the square of the radius.

The greater than sign ">" and the less than sign "<" were created by the famous British algebraist Hereot in 1631. As for the appearance of these three symbols, it was very late. The curly braces "{} and middle brackets" were coined by Wei Zhide, one of the founders of algebra.

Arbitrary (full quantifier) ** is the word "arbitrary" in English, because it is easy to confuse both lowercase and uppercase, so the first letter of the word is uppercase and then inverted. Similarly, the existence sign (existential quantifier) is the inverse of the e in the word exist.