Pith Number

pith:I3M575RS

pith:2016:I3M575RS6TBTFNFIS54DKNAZJP

not attested not anchored not stored refs pending

Causal spin foams

Giorgio Immirzi

arxiv:1610.04462 v2 · 2016-10-14 · 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{I3M575RS6TBTFNFIS54DKNAZJP}

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

3 papers in Pith

Causal structure in spin-foams

The problem of time: a path integral view

Toller matrices and the Feynman $i\varepsilon$ in spinfoams

Receipt and verification

First computed	2026-05-18T00:45:22.284443Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46d9dff632f4c332b4a897783534194bf7369814386c840f1b78e33a82696df9

Aliases

arxiv: 1610.04462 · arxiv_version: 1610.04462v2 · doi: 10.48550/arxiv.1610.04462 · pith_short_12: I3M575RS6TBT · pith_short_16: I3M575RS6TBTFNFI · pith_short_8: I3M575RS

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/I3M575RS6TBTFNFIS54DKNAZJP \
  | 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: 46d9dff632f4c332b4a897783534194bf7369814386c840f1b78e33a82696df9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9afa68dd60a797a8cd335e28ab4afb6d2bea3a9f4c9991ace1e8f41277228018",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2016-10-14T13:49:41Z",
    "title_canon_sha256": "7a54cd95213d513ce2d6ffc17ea1fd8bb30326d949306c9f7c388536b305a4aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.04462",
    "kind": "arxiv",
    "version": 2
  }
}