7 $\frac{dy}{dx}$ versus $\frac{{\mathrm d}y}{{\mathrm d}x}$ 6 Who introduced random variables into probability? 6 Who invented the Leibnitz notation $\frac{d^2y}{dx^2}$ for the *second* derivative? 6 Who first considered the $f$ in $f(x)$ as an object in itself, and who decided to call it a function? 4 Who introduced the notation $y|_{x=a}$?

### Reputation (1,319)

 +10 Who first considered the $f$ in $f(x)$ as an object in itself, and who decided to call it a function? +10 Who introduced random variables into probability? +10 Who introduced random variables into probability? -2 Where did Euler prove 'his' theorem on homogeneous functions?

### Questions (10)

 18 Who first considered the $f$ in $f(x)$ as an object in itself, and who decided to call it a function? 15 Is the prime notation for derivatives $f'$ due to Euler? 11 When and why did $\frac{dy}{dx}$ become $\frac{d}{dx}y$? 9 Historical occurrences of mathematicians substituting terms for $x$ in the denominator of $\mathrm{d}y/\mathrm{d}x$? 8 Who introduced the notation $y|_{x=a}$?

### Tags (13)

 38 mathematics × 17 7 probability × 2 23 calculus × 10 7 discoveries × 2 21 notation × 12 6 mathematicians × 2 9 terminology × 4 4 mathematical-logic × 2 7 statistics × 2 0 euler × 2

### Bookmarks (7)

 27 The history of different constructions of tangent spaces 19 Who invented the Leibnitz notation $\frac{d^2y}{dx^2}$ for the *second* derivative? 15 What is the origin of polynomials and notation for them? 10 Is the symbol for set membership $\in$ derived from greek letter $\epsilon$? 7 How were variables used and understood in (particularly) 19th century maths?