Pith Number

pith:KP33NFNK

pith:2018:KP33NFNKS6TVZMKRZDCKB4SAMG

not attested not anchored not stored refs pending

Anticipating acene-based chromophore spectra with molecular orbital arguments

Elango Kumarasamy, Eric G. Fuemmeler, Luis M. Campos, Matthew Y. Sfeir, Nandini Ananth, Samuel N. Sanders, Timothy J. H. Hele

arxiv:1812.07648 v1 · 2018-12-18 · physics.chem-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KP33NFNKS6TVZMKRZDCKB4SAMG}

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	2026-05-17T23:43:04.006970Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53f7b695aa97a75cb151c8c4a0f24061aaaca0ed8445e25e184a4b11930d49aa

Aliases

arxiv: 1812.07648 · arxiv_version: 1812.07648v1 · doi: 10.48550/arxiv.1812.07648 · pith_short_12: KP33NFNKS6TV · pith_short_16: KP33NFNKS6TVZMKR · pith_short_8: KP33NFNK

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/KP33NFNKS6TVZMKRZDCKB4SAMG \
  | 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: 53f7b695aa97a75cb151c8c4a0f24061aaaca0ed8445e25e184a4b11930d49aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "99c96190a867cb01bbd3443173db5771b150cff25f7807550327510ba4ca572d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.chem-ph",
    "submitted_at": "2018-12-18T21:31:33Z",
    "title_canon_sha256": "9d17ed369d53cdac9b80946865ae1ab97024e644c81b3e145cab85dac31ac2b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.07648",
    "kind": "arxiv",
    "version": 1
  }
}