Intersection Symbol

What does Intersection Symbol mean?

The intersection symbol ∩ has the shape of a horseshoe opening downwards. The intersection symbol is commonly used in math and engineering mainly to indicate that if one has two sets of elements, then the intersection symbol becomes the group that incorporates the relevant elements, creating a new set of elements.

The intersection symbol is widely recognized to be an associative operation because of the reason that any set of a, b, or c, end up with this: a ∩ (b ∩ c) = (a ∩ c) ∩ c. Besides, the intersection symbol is commutative, for instance in a and b, a ∩ b is equal to b ∩ a. If one has a group of sets a, b, c, and d, then it may be written like this: a ∩ b ∩ c ∩ d.

Moreover, if we take two sets, e.g., A and B, then the intersection of A and B, written A B, becomes the set C of all elements which are in either A and B. For example, the diagram which is illustrated below shows the set intersection. Sets A and B are designated as circles (including interiors). The set of A B is shown by the hatched region.

In math, the intersection of two sets A and B is notated by A ∩ B, which is the set that contains all the elements of A that also is common (or even equal) to B. The intersection symbol is written by using the sign "∩" between the elements; It is also known as infix notation.

How to use and type Intersection symbol code?

If your keyboard has a separate Num Pad, then you can be sure that your keyboard will enable you to easily type the intersection symbol. If it is not, then follow these steps:

Step 1 - You should press the Num Lock key in order to activate the Num Pad.

Step 2 - After that, you should tap and hold down the Alt key located right on the left side of the keyboard.

Step 3 - Then, you will need to type the digit (i.e., number key) that represents that symbol or character you wish to insert (in that case, it is the intersection symbol).

Step 4 - Next, release the insert key. For instance, for the greek letter omega depicted as Ω, you will need to press and hold the Alt key and type 0234 on Num Pad and then release it.

However, there is another way that works only for MS Word documents. For that, you will have to type the characters first then click on the Alt and X keys. For instance, type 0234 + Alt + X if you want to insert the Greek letter omega).

Furthermore, if you have a keyboard that does not contain a Num Pad, then here is what may work for you. Follow instructions:

Step 1 - Search for the Function key (i.e., FN) and press and hold that key. While you hold the FN key you can release the Num key. By following this step, you will be enabled to activate the numeric keypad on your laptop.

Step 2 - Then do the same steps as given in the previous example above. Note that in IBM code you do not have to use 0 (Alt + 255) before the Alt code which is different from the windows PC generator that requests to add 0 (Alt + 0255) before the Alt code.

Types of Intersection Symbols and their Unicode and HTML Codes

Here are some of the versions of intersection symbols with their definitions, Unicodes, and HTML codes:

⩈ Union Above Bar Above Intersection – Unicode ⩈ HTML code ⩈

⩃ Intersection With Overbar – Unicode ⩃ HTML code ⩃

⨅ N-ary Square Intersection Operator – Unicode ⨅ HTML code ⨅

⩄ Intersection With Logical End – Unicode ⩄ HTML code ⩄

⩇ Intersection Above Union – Unicode ⩇ HTML code ⩇

⫛ Transversal Intersection – Unicode ⫛ HTML code ⫛

⩍ Closed Intersection With Serifs – Unicode ⩍ HTML code ⩍

⩀ Intersection With Dot – Unicode ⩀ HTML code ⩀

⩉ Intersection Above Bar Above – Union Unicode ⩉ HTML code ⩉

⩎ Double Square Intersection – Unicode ⩎ HTML code ⩎

⩆ Union Above Intersection – Unicode ⩆ HTML code ⩆

⩋ Intersection Beside And Joined With Intersection – Unicode ⩋ HTML code ⩋