Pith Number

pith:7P2ZAMUK

pith:2012:7P2ZAMUKMBDB3V5JSFRUPING7I

not attested not anchored not stored refs pending

Micro-origin of Macro-strength: Friction

Alex X. Jerves, Jos\'e E. Andrade

arxiv:1212.2377 v2 · 2012-12-11 · physics.geo-ph · math-ph · math.MP · physics.class-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{7P2ZAMUKMBDB3V5JSFRUPING7I}

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	2026-05-18T03:34:35.095520Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbf590328a60461dd7a9916347a1a6fa028557149e97fd8f273adeeee56bc3ad

Aliases

arxiv: 1212.2377 · arxiv_version: 1212.2377v2 · doi: 10.48550/arxiv.1212.2377 · pith_short_12: 7P2ZAMUKMBDB · pith_short_16: 7P2ZAMUKMBDB3V5J · pith_short_8: 7P2ZAMUK

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/7P2ZAMUKMBDB3V5JSFRUPING7I \
  | 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: fbf590328a60461dd7a9916347a1a6fa028557149e97fd8f273adeeee56bc3ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "076369ce879bf89b90fcd032bd202991a9bd7714c7cc60b5a6155b4d82235756",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP",
      "physics.class-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.geo-ph",
    "submitted_at": "2012-12-11T10:39:50Z",
    "title_canon_sha256": "c1c013bf83dd30608197f6dca17b3c2a3fe671bb4dd74c91d5a203ec2c3f5bf8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.2377",
    "kind": "arxiv",
    "version": 2
  }
}