Pith Number

pith:EG447RO5

pith:2026:EG447RO5GK7BX5ALFDKNLIC77J

not attested not anchored not stored refs pending

Effective Disjunction and Effective Interpolation in Suffciently Strong Proof Systems

Martin Maxa

arxiv:2601.02821 v2 · 2026-01-06 · 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{EG447RO5GK7BX5ALFDKNLIC77J}

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	2026-08-04T01:58:25.583315Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21b9cfc5dd32be1bf40b28d4d5a05ffa5bdc731bd264dc9ef42541c864847801

Aliases

arxiv: 2601.02821 · arxiv_version: 2601.02821v2 · doi: 10.48550/arxiv.2601.02821 · pith_short_12: EG447RO5GK7B · pith_short_16: EG447RO5GK7BX5AL · pith_short_8: EG447RO5

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/EG447RO5GK7BX5ALFDKNLIC77J \
  | 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: 21b9cfc5dd32be1bf40b28d4d5a05ffa5bdc731bd264dc9ef42541c864847801

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1e36e553877c3c4cb170eaf909506b31378864f726ccbf07285dda706dd33bf1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2026-01-06T08:48:39Z",
    "title_canon_sha256": "d6e4c4d120663ffd1e85aa197efe63d674f4063e5a8294edd00f50f1ab5e3de5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.02821",
    "kind": "arxiv",
    "version": 2
  }
}