Chapter 1 Sets - Class 11 Mathematics
Chapter 1 SETS
NCERT Class 11 Mathematics for blind and visually impaired students.
This Chapter is planned, organized and described by Dr. T K Bansal for visually impaired and blind students. All efforts have been made to make the chapter fully accessible by providing headings, describing figures and tables. The Chapter has been so designed that the students should enjoy studying this chapter and should move forward without any hurdles. The chapter has been thoroughly checked for any mistakes, still if you find any mistakes or have any suggestions to make it better, please write to us at ‘ blind2Visionary@gmail.com ‘. Your efforts will be highly appreciated.
Table of symbols used in this chapter:
| Symbol | Known As | Used For | Description |
|---|---|---|---|
| ^ | Carrot | Raise to power, or superscript | A small cap, can be shift + 6 |
| _ | underscore | Subscript | shift + - |
| ∈ | Element of | Element of a set | Epsilon, a Greek letter |
| ∉ | Not an element of | Does not belong to | Epsilon is crossed with a / |
| ≤ | Less than or equal to | Less than or equal to | A – below the lower arm of < sign. |
| φ | fi | null set | Greek letter phi |
| ⊂ | subset of | a subset of | like the letter c |
| ⊄ | not a subset of | not a subset of | c with a / |
| ⇒ | rightwards double arrow | implies | a rightwards arrow on the right of = sign |
| ⇔ | left right double arrow | both ways implication | arrows on the left and right of = sign |
| ∪ | union | union | like a capital U |
| ∩ | intersection | intersection | like a inverted capital U |
| ′ | prime | compliment of | like a ' sign. |
'In these days of conflict between ancient and modern studies; there must surely be something to be said for a study which did not begin with Pythagoras and will not end with Einstein; but is the oldest and the youngest.
- G.H. HARDY