Pith Number

pith:42IMZ2NN

pith:2013:42IMZ2NNZKSCRCBQZJORGRKP2Z

not attested not anchored not stored refs pending

Depth-dependent resistance of granular media to vertical penetration

D. J. Durian, P. Mayor, T. A. Brzinski III

arxiv:1307.4638 v2 · 2013-07-17 · cond-mat.soft

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{42IMZ2NNZKSCRCBQZJORGRKP2Z}

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	2026-05-18T03:10:03.259816Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e690cce9adcaa4288830ca5d13454fd67d1f683cbb3f978d9c7c39bac8f66a47

Aliases

arxiv: 1307.4638 · arxiv_version: 1307.4638v2 · doi: 10.48550/arxiv.1307.4638 · pith_short_12: 42IMZ2NNZKSC · pith_short_16: 42IMZ2NNZKSCRCBQ · pith_short_8: 42IMZ2NN

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/42IMZ2NNZKSCRCBQZJORGRKP2Z \
  | 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: e690cce9adcaa4288830ca5d13454fd67d1f683cbb3f978d9c7c39bac8f66a47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50fac1c100fda20316aaa836272f3ce5d4fd429ee68b2a9c61b4f4732f7bebf2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.soft",
    "submitted_at": "2013-07-17T14:05:24Z",
    "title_canon_sha256": "1cf3c7e786ec42c75945fda33a492fcd9d7af8acc4cb57fc1fe945122af41b80"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.4638",
    "kind": "arxiv",
    "version": 2
  }
}