Pith Number

pith:4RNRWKFS

pith:2015:4RNRWKFSBPJUIUAKAIRMG6HNCX

not attested not anchored not stored refs pending

Deep Knowledge Tracing

Chris Piech, Jascha Sohl-Dickstein, Jonathan Huang, Jonathan Spencer, Leonidas Guibas, Mehran Sahami, Surya Ganguli

arxiv:1506.05908 v1 · 2015-06-19 · cs.AI · cs.CY · cs.LG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4RNRWKFSBPJUIUAKAIRMG6HNCX}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:42:46.914789Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e45b1b28b20bd344500a0222c378ed15dd07a5d22af3f5dee3b0e43c5882f253

Aliases

arxiv: 1506.05908 · arxiv_version: 1506.05908v1 · doi: 10.48550/arxiv.1506.05908 · pith_short_12: 4RNRWKFSBPJU · pith_short_16: 4RNRWKFSBPJUIUAK · pith_short_8: 4RNRWKFS

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/4RNRWKFSBPJUIUAKAIRMG6HNCX \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: e45b1b28b20bd344500a0222c378ed15dd07a5d22af3f5dee3b0e43c5882f253

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "437a5401c4f8a87924c3f2cf128e8686861d512bc56049ca593e02f6c35a15f5",
    "cross_cats_sorted": [
      "cs.CY",
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2015-06-19T08:29:00Z",
    "title_canon_sha256": "b0fbee47ff9ede7aac9fccbf5cafb59306bbf52f4e86273d6eaeaf2f116099d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.05908",
    "kind": "arxiv",
    "version": 1
  }
}