Add lectures folder with ethereum-crypto-2026 structure

Co-authored-by: han <han@noreply.fbrns.co>

README.md

@@ -14,8 +14,13 @@ Study system combining:
 - **graph-theory/** — Graphs, trees, algorithms
 - **algorithms/** — Complexity, sorting, searching
 - **cryptography-prep/** — Building blocks for crypto (once foundation is solid)
+- **lectures/** — Course-specific lecture notes (see below)
 - **lecture-notes/** — Raw notes from lectures before organizing
 
+## Lectures
+
+- [Ethereum Cryptography 2026](./lectures/ethereum-crypto-2026/) — EPF course
+
 ## Study Flow
 
 1. Watch lecture → save raw notes to `lecture-notes/`

lectures/ethereum-crypto-2026/00-preface.md

@@ -0,0 +1,11 @@
+**Ethereum Cryptography — 2026**
+
+Lecture notes and references for the cryptography course.
+
+Main resource: https://drive.google.com/file/d/14ZOhQr4t-6Idd_ljeMCUexFQvCmd72cp/view
+
+Course page: https://study.epf.wiki/course/view.php?id=3
+
+---
+
+(TODO: dump intro notes, preliminary content, and any supplementary materials here)

lectures/ethereum-crypto-2026/01-finite-groups-fields.md

@@ -0,0 +1,7 @@
+**Lecture 1 — Finite Groups & Fields**
+
+Main resource: https://drive.google.com/file/d/14ZOhQr4t-6Idd_ljeMCUexFQvCmd72cp/view
+
+---
+
+(TODO: notes)

lectures/ethereum-crypto-2026/02-discrete-fourier-transform.md

@@ -0,0 +1,7 @@
+**Lecture 2 — Discrete Fourier Transform**
+
+Main resource: https://drive.google.com/file/d/14ZOhQr4t-6Idd_ljeMCUexFQvCmd72cp/view
+
+---
+
+(TODO: notes)

lectures/ethereum-crypto-2026/03-elliptic-curves-pairings.md

@@ -0,0 +1,7 @@
+**Lecture 3 — Elliptic Curves & Pairings**
+
+Main resource: https://drive.google.com/file/d/14ZOhQr4t-6Idd_ljeMCUexFQvCmd72cp/view
+
+---
+
+(TODO: notes)

lectures/ethereum-crypto-2026/04-bls-signatures.md

@@ -0,0 +1,7 @@
+**Lecture 4 — BLS Signatures**
+
+Main resource: https://drive.google.com/file/d/14ZOhQr4t-6Idd_ljeMCUexFQvCmd72cp/view
+
+---
+
+(TODO: notes)

lectures/ethereum-crypto-2026/05-proof-systems.md

@@ -0,0 +1,7 @@
+**Lecture 5 — Proof Systems**
+
+Main resource: https://drive.google.com/file/d/14ZOhQr4t-6Idd_ljeMCUexFQvCmd72cp/view
+
+---
+
+(TODO: notes)