Pith Number

pith:C4NBN6MZ

pith:2019:C4NBN6MZLQQE5WUUDHAAMG7EGS

not attested not anchored not stored refs pending

On Competing Definitions for the Diederich-Forn{\ae}ss Index

Phillip S. Harrington

arxiv:1907.03689 v1 · 2019-07-08 · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C4NBN6MZLQQE5WUUDHAAMG7EGS}

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	2026-05-17T23:41:14.022296Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

171a16f9995c204eda9419c0061be434990d26c9f810b71f8b98b88a98a46e3f

Aliases

arxiv: 1907.03689 · arxiv_version: 1907.03689v1 · doi: 10.48550/arxiv.1907.03689 · pith_short_12: C4NBN6MZLQQE · pith_short_16: C4NBN6MZLQQE5WUU · pith_short_8: C4NBN6MZ

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/C4NBN6MZLQQE5WUUDHAAMG7EGS \
  | 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: 171a16f9995c204eda9419c0061be434990d26c9f810b71f8b98b88a98a46e3f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17a2f5888268ae30b3e4f29908cafc76a07f068eb2a8030155a2b98d699d5106",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2019-07-08T15:52:20Z",
    "title_canon_sha256": "92e1be6a06670ccbe3304e34d8e679724fe149fffdfdb264a44306bd1e5ff81c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.03689",
    "kind": "arxiv",
    "version": 1
  }
}