Pith Number

pith:SYGVYZSK

pith:2015:SYGVYZSKPX27QGCR3KS4NZTK3U

not attested not anchored not stored refs pending

On a problem of countable expansions

Derong Kong, Yuru Zou

arxiv:1503.07434 v2 · 2015-03-25 · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SYGVYZSKPX27QGCR3KS4NZTK3U}

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	2026-05-18T00:47:29.667488Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

960d5c664a7df5f81851daa5c6e66add2034cdb0da491472ea51c7558c9d8e16

Aliases

arxiv: 1503.07434 · arxiv_version: 1503.07434v2 · doi: 10.48550/arxiv.1503.07434 · pith_short_12: SYGVYZSKPX27 · pith_short_16: SYGVYZSKPX27QGCR · pith_short_8: SYGVYZSK

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/SYGVYZSKPX27QGCR3KS4NZTK3U \
  | 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: 960d5c664a7df5f81851daa5c6e66add2034cdb0da491472ea51c7558c9d8e16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f32eb362d572a70402a615efe017fe2c1dca7734638b8d322e9aebd8d49754e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2015-03-25T16:03:22Z",
    "title_canon_sha256": "3e67ecf0e681bd597cbf386e89c80b945fc6fa6b8df474dbfcb59d1a3db0f498"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.07434",
    "kind": "arxiv",
    "version": 2
  }
}