Pith Number

pith:V4FHZCEX

pith:2013:V4FHZCEXW5MSGXF5YVXYRISPWB

not attested not anchored not stored refs pending

A general, efficient and robust method to calculate free energy difference between systems

Asaf Farhi

arxiv:1307.1620 v7 · 2013-07-05 · physics.chem-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{V4FHZCEXW5MSGXF5YVXYRISPWB}

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	2026-05-18T03:10:26.352403Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af0a7c8897b759235cbdc56f88a24fb07b26295579309658b832365e1ca12bc0

Aliases

arxiv: 1307.1620 · arxiv_version: 1307.1620v7 · doi: 10.48550/arxiv.1307.1620 · pith_short_12: V4FHZCEXW5MS · pith_short_16: V4FHZCEXW5MSGXF5 · pith_short_8: V4FHZCEX

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/V4FHZCEXW5MSGXF5YVXYRISPWB \
  | 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: af0a7c8897b759235cbdc56f88a24fb07b26295579309658b832365e1ca12bc0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef78127ced94e4780011bd5f44cac5b1364f540ef29995c9e75d2b8c5459aa21",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.chem-ph",
    "submitted_at": "2013-07-05T14:03:19Z",
    "title_canon_sha256": "c381262fe52a67bcdbb14f6d11d0826ddd5a0e2e40d0463bbda6f9309cdf5c32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.1620",
    "kind": "arxiv",
    "version": 7
  }
}