Pith Number

pith:DZKPEHIC

pith:2015:DZKPEHICVKI2GFRAQ5W4N7A24W

not attested not anchored not stored refs pending

On the Number of Optimal Index Codes

B. Sundar Rajan, Kavitha. R

arxiv:1504.05008 v1 · 2015-04-20 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DZKPEHICVKI2GFRAQ5W4N7A24W}

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	2026-05-18T02:18:22.928157Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e54f21d02aa91a31620876dc6fc1ae59b4dbaa2d4115f3cea750a674982101f

Aliases

arxiv: 1504.05008 · arxiv_version: 1504.05008v1 · doi: 10.48550/arxiv.1504.05008 · pith_short_12: DZKPEHICVKI2 · pith_short_16: DZKPEHICVKI2GFRA · pith_short_8: DZKPEHIC

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/DZKPEHICVKI2GFRAQ5W4N7A24W \
  | 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: 1e54f21d02aa91a31620876dc6fc1ae59b4dbaa2d4115f3cea750a674982101f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8dae1191aac1cb59f412d30c70bcb27b14ba14e024d519efadcbc399d813277",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-04-20T10:53:15Z",
    "title_canon_sha256": "6239a77bea14dbd1e8fa1924ad08ec8215c8a2ab7633f71240952a325e175b13"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.05008",
    "kind": "arxiv",
    "version": 1
  }
}