Pith Number

pith:H5DYT5MN

pith:2007:H5DYT5MNZXUGSPOKPQYJSSQAHN

not attested not anchored not stored refs pending

Information theoretic approach to interactive learning

Susanne Still

arxiv:0709.1948 v2 · 2007-09-12 · physics.data-an · physics.bio-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H5DYT5MNZXUGSPOKPQYJSSQAHN}

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	2026-05-18T02:16:11.326485Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f4789f58dcde8693dca7c30994a003b4f2a6eb1be20070f385e4dc1bf647aec

Aliases

arxiv: 0709.1948 · arxiv_version: 0709.1948v2 · doi: 10.48550/arxiv.0709.1948 · pith_short_12: H5DYT5MNZXUG · pith_short_16: H5DYT5MNZXUGSPOK · pith_short_8: H5DYT5MN

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/H5DYT5MNZXUGSPOKPQYJSSQAHN \
  | 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: 3f4789f58dcde8693dca7c30994a003b4f2a6eb1be20070f385e4dc1bf647aec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "362be36c445703a6e9f1f73bdf8f5ea0c8d278a27d599dc58cf29425f2f74439",
    "cross_cats_sorted": [
      "physics.bio-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.data-an",
    "submitted_at": "2007-09-12T20:01:25Z",
    "title_canon_sha256": "efe8166b7c84cac247b15fe45eb5b5bc48eab2493a38be2cef457c930e4dfd28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0709.1948",
    "kind": "arxiv",
    "version": 2
  }
}