What is Leibniz: Definition and 63 Discussions

Gottfried Wilhelm (von) Leibniz (; German: [ˈɡɔtfʁiːt ˈvɪlhɛlm fɔn ˈlaɪbnɪts] or [ˈlaɪpnɪts]; 1 July 1646 [O.S. 21 June] – 14 November 1716) was a German philosopher, mathematician, scientist, diplomat and polymath. He is a prominent figure in both the history of philosophy and the history of mathematics. As a philosopher, he was one of the greatest representatives of 17th century rationalism. As a mathematician, his greatest achievement was the development of the main ideas of differential and integral calculus, independently of Isaac Newton's contemporaneous developments. Mathematical works have consistently favored Leibniz's notation as the conventional expression of calculus. However, it was only in the 20th century that Leibniz's law of continuity and transcendental law of homogeneity found a consistent mathematical formulation by means of non-standard analysis. He was also a pioneer in the field of mechanical calculators. While working on adding automatic multiplication and division to Pascal's calculator, he was the first to describe a pinwheel calculator in 1685 and invented the Leibniz wheel, used in the arithmometer, the first mass-produced mechanical calculator. He also refined the binary number system, which is the foundation of nearly all digital (electronic, solid-state, discrete logic) computers, including the Von Neumann architecture, which is the standard design paradigm, or "computer architecture", followed from the second half of the 20th century, and into the 21st.
In philosophy and theology, Leibniz is most noted for his optimism, i.e. his conclusion that our world is, in a qualified sense, the best possible world that God could have created, a view that was often lampooned by other thinkers, such as Voltaire in his satirical novella Candide. Leibniz, along with René Descartes and Baruch Spinoza, was one of the three great early modern rationalists. The work of Leibniz anticipated modern logic and analytic philosophy, but his philosophy also assimilates elements of the scholastic tradition, notably the assumption that some substantive knowledge of reality can be achieved by reasoning from first principles or prior definitions.
Leibniz made major contributions to physics and technology, and anticipated notions that surfaced much later in philosophy, probability theory, biology, medicine, geology, psychology, linguistics, and computer science. He wrote works on philosophy, politics, law, ethics, theology, history, and philology. Leibniz also contributed to the field of library science: while serving as overseer of the Wolfenbüttel library in Germany, he devised a cataloging system that would have served as a guide for many of Europe's largest libraries. Leibniz's contributions to this vast array of subjects were scattered in various learned journals, in tens of thousands of letters, and in unpublished manuscripts. He wrote in several languages, primarily in Latin, French and German, but also in English, Italian and Dutch. There is no complete gathering of the writings of Leibniz translated into English.

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  1. A

    Leibniz' Integral rule

    [SOLVED] Leibniz' Integral rule Homework Statement Use the Leibniz' integral rule for differentiating under the integral sign to determine constants a and b such that the integral \int^{1}_{0}(ax+b-x^{2})^{2} dx is as small as possible. Homework Equations Leibniz' Interation was...
  2. P

    Question about the use of Leibniz notations …

    Question about the use of Leibniz notations … The following article states http://www.analyzemath.com/calculus/Differential_Equations/first_order.html u(x)*dy/dx=d(y*u)/dx So what i wonder is, how can you go from u(x)*dy/dx to d(y*u)/dx ... Kindly Pellefant ...
  3. T

    A question on derivatives of leibniz

    [SOLVED] a question on derivatives of leibniz find the 50th derivetive of the function f(x)=(x^2 * sin x) i don't know how this stuff work can you please show how to solve this question step by step
  4. R

    Leibniz notation giving me a headache

    ----EDIT------ In my original post I totally messed up my variables. Here I'll get straight to the point. I guess what I am really asking is how is \frac{dy/dx}{y-900} equal to \frac{d}{dx}ln|y-900| I know that the integral of \frac{1}{y-900} is ln|y-900| but I don't understand how the...
  5. quasar987

    Purely epsilon-N proof of the Leibniz criterion for alternate series

    Homework Statement I found a purely epsilon-N proof of the Leibniz criterion for alternate series and it is quite inelegant compared to the classical proof so no wonder I never saw it in any textbook. But at the same time I must wonder if I made a mistake somewhere. The statement of the...
  6. D

    I don't understand leibniz notation

    Leibniz notation is made of ratios of differential operators? right? what does this mean? What is a differential operator? Why can we take this ratio? In a u subsitution, why can we break apart du/dx? this doesn't make sense!
  7. W

    Leibniz notation, need clarification

    This question comes from how Leibniz chose his notation. How to prove that the limit when h goes to 0 of the expression: \frac{f(x + 2h) - f(x + h) - [f(x + h) - f(x)]}{h^{2}} is f''(x)? Step 1: We know that \frac{f(x + h) - f(x)}{h} = f'(x) + a Where "a" is a value that can...
  8. Orion1

    Can a Periodic Function and Gamma Function Solve a Functional Equation?

    Is this identity true? Identity: \frac{d}{dx} x^n = \lim_{h \rightarrow 0} \frac{(x + h)^n - x^n}{h} = nx^{n-1}
  9. J

    What Are the Differences Between Newton and Leibniz Calculus?

    I was wondering if anyone had any links that could show me some Leibniz theroems or maybe a bio. Also, I was wondering, since I don't really know to much about Leibniz Calculus, what would be some major distinctions between Newton's and Leibniz's Calculus, if there are any? And what would...
  10. M

    Leibniz Notation: Explaining dy/dx

    I'm a bit confused by the leibniz notation for the derivative ie. dy/dx. I've been told that the symbol is not a fraction and can't be split, but I've also seen it split for differentials and the chain rule. Can someone concisely explain what all of it means?
  11. C

    Leibniz Rule (derivative of an integral)

    The Leibniz rule: 1. Let f(x,y) be a continuous two variable real function defined on (closed intervals) {x0, x1} x {y0, y1}. 2. Let f_1 (partial derivative of f with respect to the first variable) exists and be continuous on the same subset of RxR. 3. Let F be defined as F(x) = (int) (lim...
  12. P

    Proving Leibniz Logic: \frac{\urcorner P \equiv false}{P \equiv true}

    need to prove this \frac{\urcorner P \equiv false}{P \equiv true} here is what I did using Leibniz \frac{X \equiv Y}{E[z:=X] \equiv E[z:=Y]} X=\urcorner P Y=false E:\urcorner z z=z \frac{\urcorner P \equiv false}{\urcorner\urcorner P \equiv...
  13. quasar987

    Leibniz integral rule proof ?

    Leibniz integral rule "proof"? Does anyone know how to get the Leibniz integral rule (a.k.a. differentiation under the integral sign)? I'm clueless. It can be found here http://mathworld.wolfram.com/LeibnizIntegralRule.html
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