Pith Number

pith:ZIV57FRR

pith:2007:ZIV57FRR2VUKMA63AK3JAQ2K5C

not attested not anchored not stored refs pending

Embedded Rank Distance Codes for ISI channels

A. R. Calderbank, S. Dusad, S. N. Diggavi

arxiv:0707.4311 v1 · 2007-07-29 · 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{ZIV57FRR2VUKMA63AK3JAQ2K5C}

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	2026-05-18T00:57:58.861573Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca2bdf9631d568a603db02b690434ae8922773a6da14e2530970193baa215d60

Aliases

arxiv: 0707.4311 · arxiv_version: 0707.4311v1 · doi: 10.48550/arxiv.0707.4311 · pith_short_12: ZIV57FRR2VUK · pith_short_16: ZIV57FRR2VUKMA63 · pith_short_8: ZIV57FRR

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/ZIV57FRR2VUKMA63AK3JAQ2K5C \
  | 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: ca2bdf9631d568a603db02b690434ae8922773a6da14e2530970193baa215d60

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0a8c491795b6bf9e9d5ee328eb882f570b5f80167deb4018283e2282d2d58cc",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "",
    "primary_cat": "cs.IT",
    "submitted_at": "2007-07-29T20:47:57Z",
    "title_canon_sha256": "feffd2f27fc25140a13408cacdca5bc09c19b26be7ff8e7b0d7a8876cfefb908"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0707.4311",
    "kind": "arxiv",
    "version": 1
  }
}