Pith Number

pith:UHKBF6XV

pith:2009:UHKBF6XVP7XXXZZC4XHFD4QPFT

not attested not anchored not stored refs pending

Reconstructing Experiences through Sketching

Evangelos Karapanos, Jean-Bernard Martens, Marc Hassenzahl

arxiv:0912.5343 v3 · 2009-12-29 · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UHKBF6XVP7XXXZZC4XHFD4QPFT}

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	2026-07-04T17:22:11.391579Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1d412faf57fef7be722e5ce51f20f2ccf7ffd42c38039f618336df47f8c91d3

Aliases

arxiv: 0912.5343 · arxiv_version: 0912.5343v3 · doi: 10.48550/arxiv.0912.5343 · pith_short_12: UHKBF6XVP7XX · pith_short_16: UHKBF6XVP7XXXZZC · pith_short_8: UHKBF6XV

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/UHKBF6XVP7XXXZZC4XHFD4QPFT \
  | 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: a1d412faf57fef7be722e5ce51f20f2ccf7ffd42c38039f618336df47f8c91d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42b04fbd57b7ba28d380fab77a1925db1b8f128594212468127eeb905f891e02",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2009-12-29T17:36:35Z",
    "title_canon_sha256": "017f231aeb119aaffe08eef9bfa37459969cf73c5535a37e658d3afc310fc764"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.5343",
    "kind": "arxiv",
    "version": 3
  }
}