Pith Number

pith:6YSZMSHE

pith:2019:6YSZMSHEYYCSBLCMMNC2J76BTX

not attested not anchored not stored refs pending

In Search of Shadows: the First Topological Conference, Moscow 1935

A.I. Nazarov, D.E. Apushkinskaya, G.I. Sinkevich

arxiv:1903.02065 v3 · 2019-03-05 · 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{6YSZMSHEYYCSBLCMMNC2J76BTX}

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	2026-05-17T23:45:09.128225Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6259648e4c60520ac4c6345a4ffc19dddb24790514bbfec70bf4a55a1b2dd08

Aliases

arxiv: 1903.02065 · arxiv_version: 1903.02065v3 · doi: 10.48550/arxiv.1903.02065 · pith_short_12: 6YSZMSHEYYCS · pith_short_16: 6YSZMSHEYYCSBLCM · pith_short_8: 6YSZMSHE

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/6YSZMSHEYYCSBLCMMNC2J76BTX \
  | 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: f6259648e4c60520ac4c6345a4ffc19dddb24790514bbfec70bf4a55a1b2dd08

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1fc9c70794f563275b83188ad01e0c526131287983a8eba79bb99025293ab04",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2019-03-05T21:25:38Z",
    "title_canon_sha256": "0dbdb69a51b821411552c47853f8bd98332cf994e685bbab190386fd271ecbe0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.02065",
    "kind": "arxiv",
    "version": 3
  }
}