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PHP QR Code - QR code generator, an LGPL PHP library
PHP QR Code is open source (LGPL) library for generating QR Code, 2-dimensional barcode. Based on libqrencode C library, provides API for creating QR Code barcode images (PNG, JPEG thanks to GD2). Implemented purely in PHP, with no external dependencies (except GD2 if needed). Some of library features includes:
MiiCharacters.com - QR Codes and Instructions
Famous Mii Characters & QR Codes for your Nintendo Wii U, Wii, 3DS, and Miitomo. Search for famous Mii Characters and get printable, step-by-step instructions on how to create them. Scan Mii QR Codes with your 3DS, Wii U, or Miitomo App.
QR Decomposition with Gram-Schmidt - UCLA Mathematics
of the matrix into an orthogonal matrix and a triangular matrix. A QR decomposition of a real square matrix A is a decomposition of A as A = QR; where Q is an orthogonal matrix (i.e. QTQ = I) and R is an upper triangular matrix. If A is nonsingular, then this factorization is unique. There are several methods for actually computing the QR ...
Sign into Authenticator needs a QR code, to get QR I must sign …
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Digital COVID-19 Vaccine Record
Welcome to the Digital COVID-19 Verification Record system. Enter a few details below to get a link to a QR code and digital copy of your COVID-19 verification record. If you want to share proof of vaccination, you can use either the electronic or a printed version of the record you’ll get from the system.