Project Euler

Christmas Home Page John Rosasco is a four-time Grammy nominated music composer, producer and pianist. John also has a M.A. in Mathematics from California State University Sacramento and graduate studies in mathematics at U.C. Berkeley. He teaches math classes privately through his website at mathandmusicstudio.com. His educational interests include geometric topology and working with gifted children. By John Rosasco It is often said in recent times that we live in a new world of global competition. Most Americans see the direct correlation between a nation’s economic prosperity and its education systems, however, they are divided about how to improve our students’ math skills — a critical component in global competition. There is a call among math educators for simplification in the introductory algebra course. I. II. High school algebra and geometry have been designed as preparation for calculus. copyright 2009 by John Rosasco

proyeccion de 3d a 2d - Matemáticas Son matrices, lo que ocurre es que el programa de Todoexpertos elimina los espacios. De todas formas es equivalente lo siguiente: x' = x*cos(a) -y*sen(a) y' = x*sen(a) +y*cos(a) z' = z donde a es el ángulo que rota el eje OZ. x' = x*cos(b) -z*sen(b) y' = y z' = x*sen(b) + z*cos(b) y b es lo que has rotado el eje OY hasta ese momento. x' = x y' = y*cos(c) -z*sen(c) z' = y*sen(c) + z*cos(c) Rotas primero sobre OZ (con la variable a, que es el ángulo este), y obtienes x1, y1, z1, y estos los pones en las segundas fórmulas a la derecha y obtienes x2, y2, y3, y estos los pones en las terceras fórmulas a la derecha, y obtienes x3, y3, z3, que serán las coordenadas del punto una vez rotados los tres ejes. Con respecto a esto último, hay unas fórmulas en el web que pone lo siguiente (parece que se trata de un programador de gráficos): m_ancho = ancho_pantalla / 2; m_alto = alto_pantalla / 2; x_pantalla = (+(x_3D / z_3D) + m_ancho) * m_ancho; y_pantalla = (-(y_3D / z_3D) + m_alto) * m_alto;

Anaconda Anaconda is a completely free Python distribution (including for commercial use and redistribution). It includes over 195 of the most popular Python packages for science, math, engineering, data analysis. You can find MD5 information for Anaconda installers here. *Anaconda comes with installers for Python 2.7 and 3.4. If you do not want to download the entire distribution, Miniconda is also available. For older versions of Anaconda installers, visit the installer archive. Using a cloud service account on Amazon AWS, Microsoft Azure, or VMDepot? NumFOCUS NumFOCUS is a charitable organization with the purpose of supporting and promoting world-class, innovative, open-source scientific software.

15 feminist-improved pages for the computer engineer Barbie book Only the Internet can save Barbie from misogyny. In the book I Can Be a Computer Engineer, Barbie wants to be, as the title states, a computer engineer — which is a fantastic premise, in theory. In actuality (and in the book), Barbie needs the help of two men to code a computer program for her instead of doing it herself. Cue massive eye roll. If the book's plot wasn't enough, the artwork features bright pink laptops and sparkly, heart-shaped flash drives to really drive home the frilly girliness of Barbie instead of making her seem like a capable role model for young girls. Tumblr site Feminist Hacker Barbie is turning the groan-worthy story on its head by letting users submit their own, improved versions — complete with programmer lingo. Not only is Barbie doing her own coding, she's taking everyone to school. Show As Gallery

Bayes' Theorem An Intuitive Explanation of Bayes' Theorem Bayes' Theorem for the curious and bewildered; an excruciatingly gentle introduction. Your friends and colleagues are talking about something called "Bayes' Theorem" or "Bayes' Rule", or something called Bayesian reasoning. It's this equation. So you came here. Why does a mathematical concept generate this strange enthusiasm in its students? Soon you will know. While there are a few existing online explanations of Bayes' Theorem, my experience with trying to introduce people to Bayesian reasoning is that the existing online explanations are too abstract. Or so they claim. And let's begin. Here's a story problem about a situation that doctors often encounter: 1% of women at age forty who participate in routine screening have breast cancer. 80% of women with breast cancer will get positive mammographies. 9.6% of women without breast cancer will also get positive mammographies. What do you think the answer is? Group 1: 100 women with breast cancer.

Constructing The Universe Vitutor SublimeLinter/SublimeLinter Linux File Permissions Tutorial December 14, 2011By Roman Rafacz What we’ll cover in this article is how to identify permissions for files & directories and how to change them, as well as changing ownerships, groups, etc. Depending on what you want to do, you’ll want to make sure you have the appropriate permissions (obviously), so let’s find out how to change them. Let’s start by making a file we can use. I issued the “touch” command to make a file creatively named testfile. Touch will just create an empty file but has all the same attributes as an actual file. Commands: touch test file mkdir workfolder The permisions are broken into 4 sections. chmod – adds and removes permissions If you wanted to add or remove permissions to the user, use the command “chmod” with a “+” or “–“, along with the r (read), w (write), x (execute) attribute followed by the name of the directory or file. chmod +rwx “name of the file” chmod –rwx “name of the directory” chmod +x testfile – this would allow me to execute chmod g+w testfile Examples: 1 = –x

Pole of inaccessibility A pole of inaccessibility marks a location that is the most challenging to reach owing to its remoteness from geographical features that could provide access. Often it refers to the most distant point from the coastline. The term describes a geographic construct, not an actual physical phenomenon. Northern pole of inaccessibility[edit] Northern pole of inaccessibility The northern pole of inaccessibility ( WikiMiniAtlas 84°03′N 174°51′W / 84.050°N 174.850°W / 84.050; -174.850 (Northern Pole of Inaccessibility)), sometimes known as the Arctic pole of inaccessibility, or just Arctic pole, is located on the Arctic Oceanpack ice at a distance farthest from any land mass. According to some reports, the first person to reach the spot on foot was Sir Wally Herbert, who arrived by dogsled in 1968. Southern pole of inaccessibility[edit] Southern pole of inaccessibility The old Soviet Pole of Inaccessibility Station, revisited by Team N2i on 19 January 2007 Oceanic pole of inaccessibility[edit]

Free Products | The Math Learning Center Catalog The Math Learning Center offers a variety of free products for all grade levels. Unless otherwise noted, all of these resources can be used with any math curriculum. Lessons & Activities, Grades K-5 More than 130 activities sets and worksheets organized by grade level and topic. Bridges Breakouts, Grades K-5 Theme-based replacement units, games, and activities that provide problem-solving opportunities, skills practice, and continual encounters with broader math concepts. Problem Solving with Story Boxes, Grades K-2 Supplemental program featuring full lessons plans with blacklines, instructions for preparing manipulatives, and assessment ideas. Opening Eyes, Grades 3-4 Two year’s worth of lessons that strengthen number sense while developing students' proficiency with numeration, fractions, measurement, geometry, probability, statistics, and data analysis. Practice Books, Grades K-5 Teacher and Family Resources Bridges 1st ed CCSS Supplements