Interesting comment on the post on Facebook. Note the comment about payment as well. +++ In my university, we have been using a sagenb server for three years. We use it in Calculus/Algebra courses for mathematicians, electrical ingenieers, agricultural ingenieers, etc. We really use a few basic commands. If Sage has the 1% functionality or less than Magma, Mathematica, etc, is not a problem for us. Our main problem is that the manual and documentation are a mess, lacking of enough examples (please, why not do something like Mathematica?). Anothe problem is the interface, for instance, you can not select several cells and make copy/paste (I know this is posible with sagemathcloud). Or for instance, it is difficult to avoid that pupils share worksheets in a final individual test. With respect to functionality we have problems with basic graphics (some of them fixed today, to be fair). Still having problems solving basic inequalities. Come on guys, SAGE has A LOT of possibilities that make it for universities a better choice than Mathematica, Maple, etc. But you should take care of interface, manuals and help and basic functionalities. I'm sure that many universities would pay if flexible possibilities of payment are allowed. In my opinión SAGE has to choose: 1. Focus on development of more and new specialiced functionalities. In this case, its users will be a small group of researchers that don't care how rough or how time consuming is to make a few instructions to work properly. Besides, it will be difficult to obtain financing, thus you can compete only in a Little specialized part (magma, mathematica, maple, GAP all together is too ambicious). 2. Focus on basic functionalities on calculus and basic algebra for teaching. They need to be improved (the power of Maxima is poor in inequalities, integrals, numeric series... it is not enough at all). They need also to be user friendly and easy to learn. In this case maybe you can obtain money from universities and with that money, maybe you can work on quaternion algebras.
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