Pith Number

pith:25MT56W5

pith:2008:25MT56W5Y75WRWKRMBZCVSSXFC

not attested not anchored not stored refs pending

Boundary Terms, Variational Principles and Higher Derivative Modified Gravity

Ethan Dyer, Kurt Hinterbichler

arxiv:0809.4033 v2 · 2008-09-23 · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{25MT56W5Y75WRWKRMBZCVSSXFC}

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.

Cited by

1 paper in Pith

Ordering-Independent Wheeler-DeWitt Equation for Flat Minisuperspace Models

Receipt and verification

First computed	2026-07-04T17:27:20.540108Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7593efaddc7fb68d95160722aca5728848cf0255d4ead8edaf0af71e348854d

Aliases

arxiv: 0809.4033 · arxiv_version: 0809.4033v2 · doi: 10.48550/arxiv.0809.4033 · pith_short_12: 25MT56W5Y75W · pith_short_16: 25MT56W5Y75WRWKR · pith_short_8: 25MT56W5

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/25MT56W5Y75WRWKRMBZCVSSXFC \
  | 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: d7593efaddc7fb68d95160722aca5728848cf0255d4ead8edaf0af71e348854d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37c8472dc74d4344c52fd1f9cf8b95ba04244dffb2d0a1341c562c1028381021",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2008-09-23T21:52:36Z",
    "title_canon_sha256": "2f96c0ed00e240cfb0166ca7bf89c2260c4961af66ed29425c8a4fd9ff6cb10c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.4033",
    "kind": "arxiv",
    "version": 2
  }
}