Update README

README.md

@@ -4,10 +4,8 @@
 [![CI](https://github.com/tensor4all/ComputationalGraphs.jl/actions/workflows/CI.yml/badge.svg)](https://github.com/tensor4all/ComputationalGraphs.jl/actions/workflows/CI.yml)
 
 ## General Information
-This library provides an implementation of partitioned matrix product states (MPSs) in Julia. A `PartitionedMPS` (short for PartitionedMatrixProductStates) object is a collection of `SubDomainMPS` (short for SubDomain Matrix Product State) objects, each of which is an MPS projected on a subdomain of the whole index set.
-This library also provides a block-wise multiplication of partitioned MPSs.
-
+This library provides a simple implementation of computational graphs.
 
 ## Usage
 
-Please refer to the [documentation](https://tensor4all.github.io/ComputationalGraphs.jl/) for usage.
+Please refer to the [documentation](https://tensor4all.github.io/ComputationalGraphs.jl/) for usage instructions.