Pith Number

pith:VXVWCXVL

pith:2024:VXVWCXVLXWQOEI2HLM7BOZZXCW

not attested not anchored not stored refs pending

Feynman 1947 letter on path integral for the Dirac equation

Ted Jacobson

arxiv:2408.15070 v2 · 2024-08-27 · physics.hist-ph · hep-th · math-ph · math.MP · quant-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{VXVWCXVLXWQOEI2HLM7BOZZXCW}

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	2026-07-05T10:39:20.658771Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

adeb615eabbda0e223475b3e17673715b220bdf0d72669c6ca29531a7a698b8b

Aliases

arxiv: 2408.15070 · arxiv_version: 2408.15070v2 · doi: 10.48550/arxiv.2408.15070 · pith_short_12: VXVWCXVLXWQO · pith_short_16: VXVWCXVLXWQOEI2H · pith_short_8: VXVWCXVL

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/VXVWCXVLXWQOEI2HLM7BOZZXCW \
  | 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: adeb615eabbda0e223475b3e17673715b220bdf0d72669c6ca29531a7a698b8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f7395f674f683b4ecadff03cd577cd59945141633bb06ff25ebddb2b61f6ab8",
    "cross_cats_sorted": [
      "hep-th",
      "math-ph",
      "math.MP",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2024-08-27T13:57:51Z",
    "title_canon_sha256": "05745c81bc5c476b3e3c81d617a4d2ff7d12e3eff4842e1157cfb718304134db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2408.15070",
    "kind": "arxiv",
    "version": 2
  }
}