Pith Number

pith:ONYG2LI4

pith:2008:ONYG2LI4O4TMPOQH4NU7RWFJDH

not attested not anchored not stored refs pending

On The Behavior of Subgradient Projections Methods for Convex Feasibility Problems in Euclidean Spaces

Dan Butnariu, Ethan Hadar, Pini Gurfil, Yair Censor

arxiv:0804.3647 v1 · 2008-04-23 · math.OC · 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{ONYG2LI4O4TMPOQH4NU7RWFJDH}

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	2026-05-18T04:40:45.484779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73706d2d1c7726c7ba07e369f8d8a919faf780993de4af47476eac330ee2ceff

Aliases

arxiv: 0804.3647 · arxiv_version: 0804.3647v1 · doi: 10.48550/arxiv.0804.3647 · pith_short_12: ONYG2LI4O4TM · pith_short_16: ONYG2LI4O4TMPOQH · pith_short_8: ONYG2LI4

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/ONYG2LI4O4TMPOQH4NU7RWFJDH \
  | 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: 73706d2d1c7726c7ba07e369f8d8a919faf780993de4af47476eac330ee2ceff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca068122cc943b61fff26ea3da25ff029f05ec5493e785294d4de85977551dc9",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2008-04-23T06:48:05Z",
    "title_canon_sha256": "28f5a6d24f24c629c10d365178aec41df169b2d92daab2fa84b18ec62606bf69"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.3647",
    "kind": "arxiv",
    "version": 1
  }
}