No
The Quick Response (or QR) Code was invented by the Denso Wave company to track the vehicle manufacturing process.
This isn't a question, even. It's a statement about a line segment, QR.
Suppose x and y are two rational numbers. Therefore x = p/q and y = r/s where p, q, r and s are integers and q and s are not zero.Then x - y = p/q - r/s = ps/qs - qr/qs = (ps - qr)/qsBy the closure of the set of integers under multiplication, ps, qr and qs are all integers,by the closure of the set of integers under subtraction, (ps - qr) is an integer,and by the multiplicative properties of 0, qs is non zero.Therefore (ps - qr)/qs satisfies the requirements of a rational number.
It follows from the closure of integers under addition and multiplication.Any rational number can be expressed as a ratio of two integers, where the second is not zero. So two rational numbers may be expressed as p/q and r/s.A common multiple of their denominators is qs. So the numbers could also have been expressed as ps/qs and qr/qs.Both these have the same denominator so their sum is (ps + qr)/qs.Now, because the set of integers is closed under multiplication, ps, qr and qs are integers and because the set of integers is closed under addition, ps + qr is an integer.Thus the sum has been expressed as a ratio of two integers, ps + qr, and qs and so it is a rational number.
No
The regular configuration of a QR barcode is 3 squares in the corners of the code and pixelated squares in between them. One could also make custom QR barcodes.
A QR code is generated by a special software program developed for that purpose. Fortunately, these "QR code generators" are free online from various sources. You simply enter your URL or website address and a graphic QR code will appear on the screen. You then save that file to your computer where you can then print it onto anything you want. The standard QR code generated for free will be a square bar-code in black and white. However, that code can be further customized using graphics programs so that it fits better with your logo or website. There are discussions about how to customize QR codes.
QR code was created in 1994.
Free 2D barcode generators can be found on the following websites: "QR Code", "Beqrious", "Kerem Erkan", "QR Stuff", "Barcode.tec-it", "Wikarski" and "Wasp Barcode".
Different bar code readers can be installed using Google's Play Store. The store offers a wide range of bar code scanners such as "Bar code Scanner from ZXing Team or Google's own implementation of a qr/bar code reader : Google Goggles.
quick response cell phone that can scan a bar code and go to a web site.
Quick Response
QRZan is one of the most popular free online QR code generators. The high resolution of the QR codes and the powerful QR code campaign options make it one of the best QR code generators on the web that can be used for commercial and personal purposes.
A QR code (QR = Quick Response) is a two-dimensional barcode.
A QR Code generator free online is a web-based tool that allows you to create QR Codes without having to download any software. To use a QR Code generator free online, you first need to select the type of information you want to encode in the QR Code. This could be a website URL, contact information, or even a coupon code. Once you have selected the information, you need to enter it into the QR Code generator.
it bridges the gap between online and off-line content