Pith Number

pith:C3GRZFKQ

pith:2013:C3GRZFKQ75CVNFSKD6O2I6OGCO

not attested not anchored not stored refs pending

Superfast Tikhonov Regularization of Toeplitz Systems

(2) Georgia Institute of Technology, Christopher Turnes (1), Computer Engineering, Doru Balcan (2), Justin Romberg (1) ((1) Georgia Institute of Technology, School of Electrical, School of Interactive Computing)

arxiv:1302.6945 v2 · 2013-02-25 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C3GRZFKQ75CVNFSKD6O2I6OGCO}

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	2026-05-18T01:51:26.578760Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16cd1c9550ff4556964a1f9da479c613a60d5ff5e6ba4aa6dd02227cbac33fd8

Aliases

arxiv: 1302.6945 · arxiv_version: 1302.6945v2 · doi: 10.48550/arxiv.1302.6945 · pith_short_12: C3GRZFKQ75CV · pith_short_16: C3GRZFKQ75CVNFSK · pith_short_8: C3GRZFKQ

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/C3GRZFKQ75CVNFSKD6O2I6OGCO \
  | 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: 16cd1c9550ff4556964a1f9da479c613a60d5ff5e6ba4aa6dd02227cbac33fd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fc9889baf580b83cdf326c74e0e9504c8baf8354bb7d0fba5f7f54f22849636",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-02-25T22:49:39Z",
    "title_canon_sha256": "bcc459176f44407d2776f8b2c82d86290579024671b537537423afb59683b3bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.6945",
    "kind": "arxiv",
    "version": 2
  }
}