Pith Number

pith:R7MYIMBN

pith:2009:R7MYIMBN6LVQJOVEZZVITKWGVO

not attested not anchored not stored refs pending

The characteristic Cauchy problem for Dirac fields on curved backgrounds

Dietrich Hafner, Jean-Philippe Nicolas

arxiv:0903.0515 v2 · 2009-03-03 · math.AP · 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{R7MYIMBN6LVQJOVEZZVITKWGVO}

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	2026-05-18T04:34:37.396792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8fd984302df2eb04baa4ce6a89aac6abb17a6cf18f2446f3e12cf33c185f5ecb

Aliases

arxiv: 0903.0515 · arxiv_version: 0903.0515v2 · doi: 10.48550/arxiv.0903.0515 · pith_short_12: R7MYIMBN6LVQ · pith_short_16: R7MYIMBN6LVQJOVE · pith_short_8: R7MYIMBN

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/R7MYIMBN6LVQJOVEZZVITKWGVO \
  | 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: 8fd984302df2eb04baa4ce6a89aac6abb17a6cf18f2446f3e12cf33c185f5ecb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d23cd158b48e805d18d2f9d6640ea6447807f3611483558bd5c29956055a1b29",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2009-03-03T13:42:57Z",
    "title_canon_sha256": "5dddc1768c2d63195f2ba963ae40f26acca47c57739257bc1dbe3a19a2946de0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0515",
    "kind": "arxiv",
    "version": 2
  }
}