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Graphmatica is an equation plotter which supports five types of planar graphs (including polar, parametric, logarithmic, inequalites and limited implicit plots), plots planar vector fields and solutions of the corresponding differential equations, unlimited graphs on screen at once, saving setup information and lists of equations, flexible grid labeling, lock-on coordinate cursor and several ways to resize the grid. Its calculus options include symbolic differentiation, drawing of tangent lines, and numerical integration (you use a mouse to select points and areas). Offers on-line help and demonstration files. grmat36d.zip is the DOS version (3.60), grmat16w.zip is the Microsoft Windows 3.1 version (1.60), and grmat16n.zip is the 32 bit or win32 version (1.60). This is a fully functional shareware package.

From simple calculator operations to large-scale programming and interactive document preparation, Mathematica is the tool of choice at the frontiers of scientific research, in engineering analysis and modeling, in technical education from high school to graduate school, and wherever quantitative methods are used. Whether you need a sophisticated calculator or an integrated technical programming environment, Mathematica provides you with a complete solution. You can perform a single task - like analyzing data or solving a tricky differential equation - or develop an entire solution, prototype, or application.