Some progress on BACH, added pseudocode for better understanding

pseudocode/bach_1.typ

@@ -0,0 +1,16 @@
+#import "@preview/lovelace:0.3.0": *
+
+
+#pseudocode-list(booktabs: true, numbered-title: [Center Point Approximation])[
+  + *input*: $bold(cal(o))_"first", bold(x), t, M$
+  + *lists*: optimal weights $bold(h)_"opt"$
+  + $bold(cal(o)) arrow.l bold(cal(o))_"first"$
+  + *repeat* t times: 
+    + *perform* @alg:best_appr for all input values with $bold(cal(o))$:
+      + *update* $bold(h)_"opt"$ with returned weights
+      + $bold(z)_"opt" arrow.l$ all returned linear combinations 
+    + *sort* $bold(z)_"opt"$ in ascending order
+    + *define* new quantizer $cal(Q)^*$ using the @ecdf based on $bold(z)_"opt"$
+    + *update* $bold(cal(o))$ with newly found quantizer step centers
+  + *return* $bold(h)_"opt"$ 
+]