Pith Number

pith:XLXX7WUS

pith:2026:XLXX7WUSHUEZYFB6WOCACPENBP

not attested not anchored not stored refs pending

Non-finite Axiomatizability of Generalized Medvedev Logics

Han Xiao (Tsinghua University)

arxiv:2606.31893 v1 · 2026-06-30 · cs.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{XLXX7WUSHUEZYFB6WOCACPENBP}

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	2026-07-01T01:18:18.607099Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

baef7fda923d099c143eb384013c8d0bc4ceeb4aecaa6ff9578d888bad01b68a

Aliases

arxiv: 2606.31893 · arxiv_version: 2606.31893v1 · doi: 10.48550/arxiv.2606.31893 · pith_short_12: XLXX7WUSHUEZ · pith_short_16: XLXX7WUSHUEZYFB6 · pith_short_8: XLXX7WUS

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/XLXX7WUSHUEZYFB6WOCACPENBP \
  | 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: baef7fda923d099c143eb384013c8d0bc4ceeb4aecaa6ff9578d888bad01b68a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42e1c85cc4b290cb4599f60d4bed8b8bfaa827215e619a4ebee7b67403626af6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2026-06-30T16:02:30Z",
    "title_canon_sha256": "267ead2bbfbe661b4479f33442d2631e4464754fc6ac05c04cd70fa4c55402d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.31893",
    "kind": "arxiv",
    "version": 1
  }
}