optimize entropy

main.bib

@@ -155,4 +155,14 @@
       archivePrefix={arXiv},
       primaryClass={quant-ph},
       url={https://arxiv.org/abs/1410.7188}, 
-}
+}
+
+@book{axler2023linear,
+  title={Linear Algebra Done Right},
+  author={Axler, S.},
+  isbn={9783031410260},
+  series={Undergraduate Texts in Mathematics},
+  url={https://books.google.com/books?id=OdnfEAAAQBAJ},
+  year={2023},
+  publisher={Springer International Publishing}
+}