Pith Number

pith:427M2P42

pith:2015:427M2P42MJ4NADLIUC6RDFHXSN

not attested not anchored not stored refs pending

On a Calculus Textbook Problem

Arkady Kitover, Mehmet Orhon

arxiv:1512.07689 v1 · 2015-12-24 · 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{427M2P42MJ4NADLIUC6RDFHXSN}

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	2026-05-18T01:23:48.736445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6becd3f9a6278d00d68a0bd1194f79343fdf7817be52a9519db09e4f86e1ca1

Aliases

arxiv: 1512.07689 · arxiv_version: 1512.07689v1 · doi: 10.48550/arxiv.1512.07689 · pith_short_12: 427M2P42MJ4N · pith_short_16: 427M2P42MJ4NADLI · pith_short_8: 427M2P42

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/427M2P42MJ4NADLIUC6RDFHXSN \
  | 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: e6becd3f9a6278d00d68a0bd1194f79343fdf7817be52a9519db09e4f86e1ca1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "643fe1040ec2cff7b71b3c155fcc747fa50eff58cb60f9ab91184c1ff2a34c4d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2015-12-24T01:51:03Z",
    "title_canon_sha256": "e7db8f6ccefe96457648397c419e5dfde4d5798099d3c33a415631b6019916e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.07689",
    "kind": "arxiv",
    "version": 1
  }
}