diff --git a/.gitignore b/.gitignore
index ea8c4bf..f587ab9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
 /target
+.history
+.env
+graph.postcard
+
diff --git a/Cargo.lock b/Cargo.lock
index 4ab64f0..9788af9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -155,6 +155,29 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7059fff8937831a9ae6f0fe4d658ffabf58f2ca96aa9dec1c889f936f705f216"
 
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fca89a0e215bab21874660c67903c5f143333cab1da83d041c7ded6053774751"
+dependencies = [
+ "cfg-if",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d2fe95351b870527a5d09bf563ed3c97c0cffb87cf1c78a591bf48bb218d9aa"
+dependencies = [
+ "autocfg",
+ "cfg-if",
+ "crossbeam-utils",
+ "memoffset",
+]
+
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.17"
@@ -276,6 +299,12 @@ dependencies = [
  "byteorder",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
 [[package]]
 name = "hashbrown"
 version = "0.14.3"
@@ -284,6 +313,7 @@ checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
 dependencies = [
  "ahash",
  "allocator-api2",
+ "rayon",
 ]
 
 [[package]]
@@ -312,6 +342,16 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d77f7ec81a6d05a3abb01ab6eb7590f6083d08449fe5a1c8b1e620283546ccb7"
 
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown 0.12.3",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.1.0"
@@ -319,7 +359,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.14.3",
+ "rayon",
 ]
 
 [[package]]
@@ -328,6 +369,15 @@ version = "2.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e186cfbae8084e513daff4240b4797e342f988cecda4fb6c939150f96315fd8"
 
+[[package]]
+name = "itertools"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itertools"
 version = "0.11.0"
@@ -337,6 +387,15 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25db6b064527c5d482d0423354fcd07a89a2dfe07b67892e62411946db7f07b0"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -371,7 +430,7 @@ version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2994eeba8ed550fd9b47a0b38f0242bc3344e496483c6180b69139cc2fa5d1d7"
 dependencies = [
- "hashbrown",
+ "hashbrown 0.14.3",
 ]
 
 [[package]]
@@ -389,6 +448,15 @@ version = "2.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
 
+[[package]]
+name = "memoffset"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.7.1"
@@ -420,6 +488,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "num-traits"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.16.0"
@@ -447,12 +524,15 @@ dependencies = [
  "async-channel",
  "crossterm",
  "error-stack",
+ "itertools 0.12.0",
  "pathdiff",
  "petgraph",
  "postcard",
  "ratatui",
  "regex",
+ "rustworkx-core",
  "serde",
+ "simple-pagerank",
  "thiserror",
  "tokio",
  "tracing",
@@ -520,7 +600,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e1d3afd2628e69da2be385eb6f2fd57c8ac7977ceeff6dc166ff1657b0e386a9"
 dependencies = [
  "fixedbitset",
- "indexmap",
+ "indexmap 2.1.0",
  "serde",
  "serde_derive",
 ]
@@ -543,6 +623,22 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+
+[[package]]
+name = "priority-queue"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fff39edfcaec0d64e8d0da38564fad195d2d51b680940295fcc307366e101e61"
+dependencies = [
+ "autocfg",
+ "indexmap 1.9.3",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.70"
@@ -561,6 +657,45 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_pcg"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59cad018caf63deb318e5a4586d99a24424a364f40f1e5778c29aca23f4fc73e"
+dependencies = [
+ "rand_core",
+]
+
 [[package]]
 name = "ratatui"
 version = "0.24.0"
@@ -571,7 +706,7 @@ dependencies = [
  "cassowary",
  "crossterm",
  "indoc",
- "itertools",
+ "itertools 0.11.0",
  "lru",
  "paste",
  "strum",
@@ -579,6 +714,37 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "rayon"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c27db03db7734835b3f53954b534c91069375ce6ccaa2e065441e07d9b6cdb1"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-cond"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ac2a28c5317e6d26ac87a8629c0eb362690ed1d739f4040e21cfaafdf04e6f8"
+dependencies = [
+ "either",
+ "itertools 0.10.5",
+ "rayon",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ce3fb6ad83f861aac485e76e1985cd109d9a3713802152be56c3b1f0e0658ed"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.4.1"
@@ -653,6 +819,25 @@ version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7ffc183a10b4478d04cbbbfc96d0873219d962dd5accaff2ffbd4ceb7df837f4"
 
+[[package]]
+name = "rustworkx-core"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72abf7976bc09a30391248b3c6509338b235c02b0e9b0bf8af686c289cad3f45"
+dependencies = [
+ "ahash",
+ "fixedbitset",
+ "hashbrown 0.14.3",
+ "indexmap 2.1.0",
+ "num-traits",
+ "petgraph",
+ "priority-queue",
+ "rand",
+ "rand_pcg",
+ "rayon",
+ "rayon-cond",
+]
+
 [[package]]
 name = "same-file"
 version = "1.0.6"
@@ -733,6 +918,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "simple-pagerank"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47d2b6d15dfae728ed12a9d722c0b494cf85d2ba27f6e93443c7b3e6a614870f"
+
 [[package]]
 name = "smallvec"
 version = "1.11.2"
diff --git a/Cargo.toml b/Cargo.toml
index 391d348..6dae960 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,12 +10,15 @@ ahash = { version = "0.8.6", features = ["serde"] }
 async-channel = "2.1.1"
 crossterm = "0.27.0"
 error-stack = "0.4.1"
+itertools = "0.12.0"
 pathdiff = "0.2.1"
 petgraph = { version = "0.6.4", features = ["serde-1"] }
 postcard = { version = "1.0.8", features = ["alloc", "use-std"] }
 ratatui = "0.24.0"
 regex = "1.10.2"
+rustworkx-core = "0.13.2"
 serde = { version = "1.0.193", features = ["derive"] }
+simple-pagerank = "0.2.0"
 thiserror = "1.0.51"
 tokio = { version = "1.35.1", features = ["rt-multi-thread", "macros", "fs"] }
 tracing = "0.1.40"
diff --git a/src/bin/build-index.rs b/src/bin/build-index.rs
index 17ab4f5..4e0aee4 100644
--- a/src/bin/build-index.rs
+++ b/src/bin/build-index.rs
@@ -4,7 +4,7 @@ use std::{
     thread,
 };
 
-use ahash::AHashMap;
+use ahash::{AHashMap, AHashSet};
 use regex::Regex;
 use walkdir::WalkDir;
 
@@ -92,7 +92,7 @@ async fn main() {
 
         let index = note_name_unique_to_index
             .entry(note_name_unique.clone())
-            .or_insert_with(|| graph.add_node(note_name_unique));
+            .or_insert_with(|| graph.add_node(note_name_unique.clone()));
 
         let index = *index;
 
@@ -103,15 +103,21 @@ async fn main() {
 
         let wikilinks = wikilink_regex.captures_iter(&contents);
 
-        for wikilink in wikilinks {
-            tracing::info!(?wikilink);
+        let mut outgoing = AHashSet::new();
 
+        for wikilink in wikilinks {
             let link = wikilink.name("link").unwrap();
 
-            tracing::info!(?wikilink);
+            let link_as_string = link.as_str().to_string();
+
+            outgoing.insert(link_as_string);
+        }
+
+        for link in outgoing {
+            tracing::info!(note_name_unique, link, "linking");
 
             let outgoing_index = note_name_unique_to_index
-                .entry(link.as_str().to_string())
+                .entry(link)
                 .or_insert_with_key(|k| graph.add_node(k.to_owned()));
 
             graph.add_edge(index, *outgoing_index, ());
diff --git a/src/bin/fundamentals.rs b/src/bin/fundamentals.rs
new file mode 100644
index 0000000..c689bf6
--- /dev/null
+++ b/src/bin/fundamentals.rs
@@ -0,0 +1,51 @@
+use std::iter::zip;
+
+use petgraph::visit::EdgeRef;
+use rustworkx_core::centrality::katz_centrality;
+
+use simple_pagerank::Pagerank;
+
+use itertools::Itertools;
+
+#[tokio::main]
+async fn main() {
+    tracing_subscriber::fmt::init();
+
+    let file = std::fs::read("graph.postcard").unwrap();
+
+    let graph: petgraph::graph::DiGraph<String, ()> = postcard::from_bytes(&file).unwrap();
+
+    let mut pagerank = Pagerank::new();
+
+    for edge in graph.edge_references() {
+        let source = edge.source();
+        let target = edge.target();
+
+        pagerank.add_edge(source, target);
+    }
+
+    pagerank.calculate();
+    // pagerank.calculate_with_convergence(0.00000003);
+
+    for (node_index, rank) in pagerank.nodes().into_iter().take(50) {
+        let node_weight = graph.node_weight(*node_index);
+
+        tracing::info!(?node_weight, rank);
+    }
+
+    if false {
+        let katz_centralities =
+            katz_centrality(&graph, |_| Ok::<_, ()>(1.0), None, None, None, None, None);
+        let katz_centralities = katz_centralities.unwrap().unwrap();
+
+        let mut nodes_and_indices = zip(graph.node_indices(), katz_centralities).collect_vec();
+        nodes_and_indices.sort_by(|(idx_a, centrality_a), (idx_b, centrality_b)| {
+            centrality_a.partial_cmp(centrality_b).unwrap()
+        });
+
+        for (node_index, centrality) in nodes_and_indices {
+            let node = graph.node_weight(node_index);
+            tracing::info!(?node_index, ?node, centrality);
+        }
+    }
+}