Features description.

Author: gsvgit

README.md

@@ -1,6 +1,11 @@
 # GraphBLAS-sharp
 
-GraphBLAS# is a GPGPU-based GraphBLAS implementation in F#. To utilize GPGPUs we use [Brahma.FSharp](https://github.com/YaccConstructor/Brahma.FSharp). So, GraphBLAS# can utilize any OpenCL compatible device.
+GraphBLAS# is a GPGPU-based [GraphBLAS](https://graphblas.org/) implementation in F#. To utilize GPGPUs we use [Brahma.FSharp](https://github.com/YaccConstructor/Brahma.FSharp). So, GraphBLAS# can utilize any OpenCL compatible device.
+
+### Features
+- ```Option<'t>``` to solve [explicit/implicit zeroes problem](https://github.com/GraphBLAS/LAGraph/issues/28#issuecomment-542952115). If graph has labels of type ```'t``` then adjacency matrix is ```Matrix<Option<'t>>```. Sparse storage contains only values for ```Some<'t>``` cells. 
+- Elementwise operations have type ```AtLeastOne<'t> -> Option<'t>``` to be shure that ```None op None``` is ```None```. Also developer explicitly controls what should be ```None```. So, type of matrix-matrix elementwise oertion is ```Matrix<Option<'t1>> -> Matrix<Option<'t2>> -> (AtLeastOne<'t1,'t2> -> Option<'t3>) -> Matrix<Option<'t3>>```. 
+- No semirings. Just functions. Ofcourse one can implement semirings on the top of implemented API.
 
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@@ -17,12 +22,13 @@ Package | Stable | Prerelease
 --- | --- | ---
 GraphBLAS-sharp | [![NuGet Badge](https://buildstats.info/nuget/GraphBLAS-sharp)](https://www.nuget.org/packages/GraphBLAS-sharp/) | [![NuGet Badge](https://buildstats.info/nuget/GraphBLAS-sharp?includePreReleases=true)](https://www.nuget.org/packages/GraphBLAS-sharp/)
 
+
+
 ## Contributing
 Contributions, issues and feature requests are welcome.
 Feel free to check [issues](https://github.com/YaccConstructor/GraphBLAS-sharp/issues) page if you want to contribute.
 
-
-### Build
+## Build
 Make sure the following **requirements** are installed on your system:
 - [dotnet SDK](https://dotnet.microsoft.com/en-us/download/dotnet/5.0) 5.0 or higher
 - OpenCL-compatible device and respective OpenCL driver