Update README.md

Author: wenyan4work

README.md

@@ -1,4 +1,4 @@
-# aLENS (active Living ENsemble Simulator)
+# aLENS (a Living ENsemble Simulator)
 The motivation, algorithm and examples are discussed in this paper: 
 [aLENS: towards the cellular-scale simulation of motor-driven cytoskeletal assemblies](https://arxiv.org/abs/2109.08206)
 
@@ -149,4 +149,4 @@ If you are not sure how you should setup things, consult your system administrat
 - `OPENBLAS_NUM_THREADS=N` Change `N` to tune multithreading. .
 
 The priorities are `OPENBLAS_NUM_THREADS` > `GOTO_NUM_THREADS` > `OMP_NUM_THREADS`.
-If you compile OpenBLAS with `USE_OPENMP=1`, you should set the `OMP_NUM_THREADS` environment variable; OpenBLAS ignores `OPENBLAS_NUM_THREADS` and `GOTO_NUM_THREADS` when compiled with `USE_OPENMP=1`.
+If you compile OpenBLAS with `USE_OPENMP=1`, you should set the `OMP_NUM_THREADS` environment variable; OpenBLAS ignores `OPENBLAS_NUM_THREADS` and `GOTO_NUM_THREADS` when compiled with `USE_OPENMP=1`.