Automatically corrects errors in mathematical syntax.
Calculators are used to get the right answer when you don’t know what that answer should be. Unfortunately if you make any slip in a calculation, you simply get the wrong answer. While this may be merely inconvenient for many, in a safety critical environment (such as a hospital — in radiotherapy or drug dosing) numerical errors can be fatal. This invention is a next generation general-purpose calculator that automatically corrects errors in mathematical syntax (something like a spell or grammar checker in a document) so that the conclusion is always consistent with the input. Numbers and equations are written freehand using everyday notation and are automatically recognised and formatted in a mathematically correct manner. Although input errors can still occur, the format makes them instantly recognisable and the invention makes them extremely easy to correct. In trials, a 60% pass rate using conventional calculators (for maths exams) was increased to 100% A patent has been granted; other patent applications are pending