Pith Number

pith:FD34E7TV

pith:2009:FD34E7TVHVGV4WLYJI56YIFIYE

not attested not anchored not stored refs pending

Deriving the ADM 3+1 evolution equations from the second variation of arc length

Leo Brewin

arxiv:0903.5365 v2 · 2009-03-31 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FD34E7TVHVGV4WLYJI56YIFIYE}

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	2026-05-18T00:49:52.994276Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28f7c27e753d4d5e59784a3bec20a8c122099b00af36a910ed9c2ac5fe07fcbb

Aliases

arxiv: 0903.5365 · arxiv_version: 0903.5365v2 · doi: 10.48550/arxiv.0903.5365 · pith_short_12: FD34E7TVHVGV · pith_short_16: FD34E7TVHVGV4WLY · pith_short_8: FD34E7TV

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/FD34E7TVHVGV4WLYJI56YIFIYE \
  | 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: 28f7c27e753d4d5e59784a3bec20a8c122099b00af36a910ed9c2ac5fe07fcbb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d70cf20c90c2990ef6ded2b56cb7553a943cd600d80476171e10bdc90d06d085",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-03-31T04:50:11Z",
    "title_canon_sha256": "9c3555ae4e10209bc90bc497116edca042fdd3dadba9ec09baf5fd27a622f5d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.5365",
    "kind": "arxiv",
    "version": 2
  }
}