Pith Number

pith:QIYT6J3I

pith:2017:QIYT6J3IY36DKCYS2RBOJ7HPYQ

not attested not anchored not stored refs pending

The Parameterized Complexity of Happy Colorings

I. Vinod Reddy, Neeldhara Misra

arxiv:1708.03853 v1 · 2017-08-13 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QIYT6J3IY36DKCYS2RBOJ7HPYQ}

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	2026-05-18T00:38:07.734026Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82313f2768c6fc350b12d442e4fcefc42a7dd7beb38d676a8ca96c85409c4fa9

Aliases

arxiv: 1708.03853 · arxiv_version: 1708.03853v1 · doi: 10.48550/arxiv.1708.03853 · pith_short_12: QIYT6J3IY36D · pith_short_16: QIYT6J3IY36DKCYS · pith_short_8: QIYT6J3I

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/QIYT6J3IY36DKCYS2RBOJ7HPYQ \
  | 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: 82313f2768c6fc350b12d442e4fcefc42a7dd7beb38d676a8ca96c85409c4fa9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25fc656c9bdfcf83d07b79e28c3711e63d88d1aefb6e343dff8daff33c8a6d90",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-08-13T04:52:27Z",
    "title_canon_sha256": "bd56d2e569bfe1ae0d4115253d7647c42d23d72c0552093f7beca41a9448f085"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.03853",
    "kind": "arxiv",
    "version": 1
  }
}