Pith Number

pith:UZJQHWDR

pith:2013:UZJQHWDRTZ3I7Z6DAR5WVI4SUB

not attested not anchored not stored refs pending

Spatially Coupled Sparse Codes on Graphs - Theory and Practice

Daniel J. Costello, David G. M. Mitchell, Joerg Kliewer, Jr., Lara Dolecek, Roxana Smarandache, Thomas E. Fuja

arxiv:1310.3724 v1 · 2013-10-14 · 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{UZJQHWDRTZ3I7Z6DAR5WVI4SUB}

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	2026-05-18T00:58:41.922413Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a65303d8719e768fe7c3047b6aa392a07e7cc05a82b6a9a0eb13fd27a1cd997a

Aliases

arxiv: 1310.3724 · arxiv_version: 1310.3724v1 · doi: 10.48550/arxiv.1310.3724 · pith_short_12: UZJQHWDRTZ3I · pith_short_16: UZJQHWDRTZ3I7Z6D · pith_short_8: UZJQHWDR

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/UZJQHWDRTZ3I7Z6DAR5WVI4SUB \
  | 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: a65303d8719e768fe7c3047b6aa392a07e7cc05a82b6a9a0eb13fd27a1cd997a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7dc75eaae5583625312a774d7df1272a0e6fce1b90f8bea274ae55a0e588ce6",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-10-14T15:37:39Z",
    "title_canon_sha256": "d6200ebd36973dfb9eddd982517edccc092ca60e23b8fd5b23a53a626294ee12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.3724",
    "kind": "arxiv",
    "version": 1
  }
}