Pith Number

pith:XJZA5LYP

pith:2018:XJZA5LYPVVNRGW7KI2CTXUEEMY

not attested not anchored not stored refs pending

Klein vs Mehrtens: restoring the reputation of a great modern

David Sherry, Jacques Bair, Jan Peter Sch\"afermeyer, Mikhail G. Katz, Peter Heinig, Piotr B{\l}aszczyk

arxiv:1803.02193 v1 · 2018-03-06 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XJZA5LYPVVNRGW7KI2CTXUEEMY}

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	2026-05-18T00:14:53.671755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba720eaf0fad5b135bea46853bd08466303623dc44a736cb47a4c49c24bdf87c

Aliases

arxiv: 1803.02193 · arxiv_version: 1803.02193v1 · doi: 10.48550/arxiv.1803.02193 · pith_short_12: XJZA5LYPVVNR · pith_short_16: XJZA5LYPVVNRGW7K · pith_short_8: XJZA5LYP

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/XJZA5LYPVVNRGW7KI2CTXUEEMY \
  | 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: ba720eaf0fad5b135bea46853bd08466303623dc44a736cb47a4c49c24bdf87c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f721d509eba87b31505a679d85cf4c18d7f885935a331dec640c442b3cd5ee2e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2018-03-06T14:15:51Z",
    "title_canon_sha256": "a1f49d8443b0849871c29d88d1b2e70b848f5249d8d6967937e458c607cb99d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.02193",
    "kind": "arxiv",
    "version": 1
  }
}