diff --git a/Lectures/L00.pdf b/Lectures/L00.pdf
index 33ecca6..95e15e2 100644
Binary files a/Lectures/L00.pdf and b/Lectures/L00.pdf differ
diff --git a/Lectures/L01.pdf b/Lectures/L01.pdf
index ea8a4a7..c5cbe5e 100644
Binary files a/Lectures/L01.pdf and b/Lectures/L01.pdf differ
diff --git a/Lectures/L02 .pdf b/Lectures/L02 .pdf
new file mode 100644
index 0000000..cb4cd29
Binary files /dev/null and b/Lectures/L02 .pdf differ
diff --git a/Lectures/L03.pdf b/Lectures/L03.pdf
new file mode 100644
index 0000000..37a97cc
Binary files /dev/null and b/Lectures/L03.pdf differ
diff --git a/Lectures/L04.pdf b/Lectures/L04.pdf
new file mode 100644
index 0000000..f112c85
Binary files /dev/null and b/Lectures/L04.pdf differ