add several sources and fix some errors in text

sources.bib

@@ -197,3 +197,33 @@
       primaryClass={cs.CV},
       url={https://arxiv.org/abs/2101.00562},
 }
+
+
+@book{analysisrudin,
+    title = {Principles of mathematical analysis},
+    author = {Walter Rudin},
+    isbn = {},
+    series = {Mathermatics Series},
+    year = {1976},
+    publisher = {Mc Graw Hill},
+    keywords = {mathematics}
+}
+
+
+@book{dataminingbook,
+    title = {Data Mining: Concepts and Techniques},
+    author = {Jiawei Han, Micheline Kamber, Jian Pei},
+    isbn = {},
+    series = {The Morgan Kaufmann Series in Data Management Systems},
+    year = {2012},
+    publisher = {Morgran Kaufmann},
+    keywords = {mathematics}
+}
+
+@book{Goodfellow-et-al-2016,
+    title={Deep Learning},
+    author={Ian Goodfellow and Yoshua Bengio and Aaron Courville},
+    publisher={MIT Press},
+    note={\url{http://www.deeplearningbook.org}},
+    year={2016}
+}