The intersection of two graphs means that they have a common part, or the point sets belonging to both graphs are not empty sets. For set a and set b, A∩B represents all elements belonging to both a and b, and the set they form is called a-b.
Complete works of mathematical symbols
1, sign of quantity: for example, I, 2+i, A, X, natural logarithm base E, pi.
2. Operation symbols: such as plus sign (+), minus sign (-), multiplication sign (× or), division sign (÷ or/), union of two sets (∩), intersection (∩), root sign (√), logarithm (log, lg, ln).
3. relational symbols: for example, = is equal sign, ≈ is approximate sign, ≠ is unequal sign, > is greater than sign,