Pith Number

pith:URLT3JNW

pith:2021:URLT3JNWKC5VBE3OHXHTRG4NO3

not attested not anchored not stored refs pending

On the independence of Robinson's set of axioms for propositional calculus

Beno\^it Jubin

arxiv:2109.14745 v4 · 2021-09-29 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{URLT3JNWKC5VBE3OHXHTRG4NO3}

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	2026-07-05T04:49:29.828116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4573da5b650bb50936e3dcf389b8d76cf8595f5e34fb9eca5be469addef9a9f

Aliases

arxiv: 2109.14745 · arxiv_version: 2109.14745v4 · doi: 10.48550/arxiv.2109.14745 · pith_short_12: URLT3JNWKC5V · pith_short_16: URLT3JNWKC5VBE3O · pith_short_8: URLT3JNW

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/URLT3JNWKC5VBE3OHXHTRG4NO3 \
  | 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: a4573da5b650bb50936e3dcf389b8d76cf8595f5e34fb9eca5be469addef9a9f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df8b0a5726ae1c0782c4b81ade2fcdec7f2002c14b8619b776e233d4f4c58bae",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2021-09-29T22:37:30Z",
    "title_canon_sha256": "8a1eacc55826e757b2f2b4a75e282ee6ad3be314203fdf47a8d85988decad864"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.14745",
    "kind": "arxiv",
    "version": 4
  }
}