arXiv.org e-Print archive Jornais Antigos Jornal CORREIO BRAZILIENSE de junho de 1808 Diario de Porto Alegre (1827) foi o primeiro jornal gaúcho, impresso por dois desertores franceses da Guerra Cisplatina Jornal brasileiro O UNIVERSAL de 18/05/1836 anuncia recompensa por um escravo fugido O Povo (1838), órgão oficial dos Farrapos, parou de circular quando sua tipografia foi destruída pelas forças imperiais, em Caçapava- 01/09/1838 Jornal ARCHIVO PITORESCO de 01/07/1857 A Sentinella do Sul (1867) foi o primeiro jornal ilustrado do Rio Grande do Sul e revelou o chargista Inácio Weingartner Jornal O FAÍSCA de 1885 Jornal brasileiro A PROVÍNCIA DE MINAS de 07/06/1887 anuncia recompensa por um escravo fugido Para ver mais imagens relacionadas aos escravos, acesse o post Escravidão Jornal A CORJA de 31/07/1898 Para ver mais imagens dos jornais CORREIO BRAZILIENSE e A CORJA acesse o post Repressão à imprensa e à liberdade de expressão Jornal português A VIDA GALANTE de 07/01/1899 Jornal O ESTADO DE SÃO PAULO de 19/08/1943
CUAES Harvard’s Alternative to Google Books In 2004, Google decided to seek out millions of books gathering dust in library stacks, digitize them, and make them available to you at the click of a mouse. All you had to do was notice the advertisements in the margins. But after Google extended its archiving effort from books in the public domain to those under copyright, the U.S.-based Authors Guild filed a class action lawsuit in 2005. Then, while negotiating a settlement, Google decided to sell not merely ads but the books themselves, with or without the specific consent of copyright holders, on the ground that the guild could stand in as their legal representative. Not so fast, said federal judge Denny Chin, as he rejected one Guild-Google settlement after another. In 2010, university librarians met in a national conference and decided to create an alternative called the Digital Public Library of America. “This is a civic-minded engagement,” says Kenny Whitebloom, who manages the library project.
Khan Academy Complex plane Geometric representation of z and its conjugate z̅ in the complex plane. The distance along the light blue line from the origin to the point z is the modulus or absolute value of z. The angle φ is the argument of z. In mathematics, the complex plane or z-plane is a geometric representation of the complex numbers established by the real axis and the orthogonal imaginary axis. Notational conventions In complex analysis the complex numbers are customarily represented by the symbol z, which can be separated into its real (x) and imaginary (y) parts, like this: for example: z = 4 + 5i, where x and y are real numbers, and i is the imaginary unit. In the Cartesian plane the point (x, y) can also be represented in polar coordinates as where Here |z| is the absolute value or modulus of the complex number z; θ, the argument of z, is usually taken on the interval 0 ≤ θ < 2π; and the last equality (to |z|eiθ) is taken from Euler's formula. Stereographic projections Cutting the plane
Vintage Guide UFDC Home - Institutional Repository at the University of Florida (IR@UF) Perseus Digital Library Free Online MIT Course Materials | Audio/Video Courses | MIT Ope Fundamental theorem of algebra The fundamental theorem of algebra states that every non-constant single-variable polynomial with complex coefficients has at least one complex root. This includes polynomials with real coefficients, since every real number is a complex number with zero imaginary part. History Peter Rothe, in his book Arithmetica Philosophica (published in 1608), wrote that a polynomial equation of degree n (with real coefficients) may have n solutions. As will be mentioned again below, it follows from the fundamental theorem of algebra that every non-constant polynomial with real coefficients can be written as a product of polynomials with real coefficients whose degree is either 1 or 2. where α is the square root of 4 + 2√7. A first attempt at proving the theorem was made by d'Alembert in 1746, but his proof was incomplete. At the end of the 18th century, two new proofs were published which did not assume the existence of roots. Proofs when |z| > R. Complex-analytic proofs and let
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