What does the symbol "$|_{\epsilon=0}$" mean with a derivative?
20049
What is the name of the vertical bar in $(x^2+1)\vert_{x = 4}$ or $\left.\left(\frac{x^3}{3}+x+c\right) \right\vert_0^4$?
96589
Word Question Involving the Definition of the Derivative
118012
Meaning of different Orders of Derivative
143638
Double.Epsilon for equality, greater than, less than, less than or equal to, greater than or equal to
27888
Why is $|x|$ not differentiable at $x=0$?
89034
For any $\epsilon$, if $\epsilon>0$ and $|x|<\epsilon$, then $x=0$
151493
Using $\epsilon$-$\delta$ to show a property of a function
51253
Graphical intuition behind directional derivative interpreted as a(∂f/∂x)+b(∂f/∂y), where  is directional vector of unit length?
142873
What does the function f: x ↦ y mean?
12107
How is the epsilon-delta definition of continuity equivalent to the following statement?
109187
The differences between Lagrange and Leibniz's derivative notations
135941
Derivative of $|x|^\alpha$
11385
Using the Limit definition to find the derivative of $e^x$
84199
What does the $\|$ operation mean in cryptographic notation?
89057
How does one properly define the derivative of one operator-valued function?
69854
Why is there a minus sign in this wave equation derivation?
62024
Notation: What does the tilde below of the expectation mean?