Lambda (Linear Access to Mathematics for Braille Device and Audio-synthesis) is a system for writing mathematics on a computer designed expressly for use with a Braille display and vocal synthesis. It was developed during a 3-year European project with the participation of 15 partners from 8 different countries. It was based on a system of linear writing: the mathematical formulas were written textually with a one-dimensional regular sequence of characters.

Download here a trial version, valid for two months.

ATTENTION, if you have already purchased and installed earlier versions of 1.4 and wish to upgrade, please first contact us from contact page.

At the end of the trial period, you will need to register the program. Use the relevant request form to purchase the license.

Modifications to the earlier version (1.30)

  • Program activation modality has changed. Management is now fully online. This will allow users to deactivate and re-activate the license at their own wish. Read details on the license purchase page).

Informations for Activation and Deactivation of the current version

Please read carefully the Lambda informations page.

Informations about the screen reader NVDA

Thanks to Peter Lecky Comenius University Bratislava (Faculty of Mathematics, Physics and Informatics Support Centre for Visually Impaired Students) wich has developed a script to use Lambda with NVDA. With the courtesy of the author the same are available to be downloaded from the Lambda download page.

To work correctly the script NVDA must be used as "portable", if you are not already using it in this modality you will need to prepare it by clicking on the NVDA menu tools/Create portable copy...

Once in portable mode you must copy the script file you have downloaded earlier in the folder UserConfig\appModules.

Notes for graphical visualization

Lambda's graphical visualization is either integrated into an Internet Explorer window or externally, into the browser. To use the rendering (visualization) you will need to install a plug-in, freely downloadable from the following link: MathPlayer