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2. pdfimages - Wikipedia

   en.wikipedia.org/wiki/Pdfimages

   pdfimages is an open-source command-line utility for lossless extraction of images from PDF files, including JPEG2000 and JBIG2 format when used with option -all. [1] It is freely available as part of poppler-utils and xpdf-utils, and included in many Linux distributions. pdfimages originates from the xpdf package (but now part of poppler-utils).

3. Extractor (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Extractor_(mathematics)

   An (,,,,)-extractor is a bipartite graph with nodes on the left and nodes on the right such that each node on the left has neighbors (on the right), which has the added property that for any subset of the left vertices of size at least , the distribution on right vertices obtained by choosing a random node in and then following a random edge to ...

4. Math Images Project - Wikipedia

   en.wikipedia.org/wiki/Math_Images_Project

   The Math Images Project is a wiki collaboration between Swarthmore College, the Math Forum at Drexel University, and the National Science Digital Library. The project aims to introduce the public to mathematics through beautiful and intriguing images found throughout the fields of math. The Math Images Project runs on MediaWiki software, as ...

5. List of PDF software - Wikipedia

   en.wikipedia.org/wiki/List_of_PDF_software

   PDF Tools allows creation of PDFs from many types of source input (images, scans, etc.). The PDF-XChange print driver allows printing directly to a PDF. A "lite" version of the print driver is free for non-commercial (home and academic) use. PrimoPDF: Proprietary: Yes: Virtual printer, for Microsoft .NET Framework and uses Ghostscript and RedMon.

6. Kumon - Wikipedia

   en.wikipedia.org/wiki/Kumon

   All Kumon programs are pencil-and-worksheet-based, with a digital program that started in 2023. The worksheets increase in difficulty in small increments. [9] [10] Psychologist Kathy Hirsh-Pasek says that using such techniques for 2 to 12-year-olds "does not give your child a leg up on anything". [7] One study has observed a high percentage of ...

7. Image (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Image_(mathematics)

   The image of the function is the set of all output values it may produce, that is, the image of . The preimage of f {\displaystyle f} , that is, the preimage of Y {\displaystyle Y} under f {\displaystyle f} , always equals X {\displaystyle X} (the domain of f {\displaystyle f} ); therefore, the former notion is rarely used.