Pith Number

pith:FZR2NAUB

pith:2013:FZR2NAUBRX2IYEZIZGGH6ONAUE

not attested not anchored not stored refs pending

Approximation systems for functions in topological and in metric spaces

Bulgaria), Dimiter Skordev (Sofia University, Faculty of Mathematics, Informatics, Sofia

arxiv:1310.5656 v3 · 2013-10-21 · cs.LO · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FZR2NAUBRX2IYEZIZGGH6ONAUE}

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	2026-05-18T01:37:37.715230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e63a682818df48c1328c98c7f39a0a12505c4567fed2be194a2ba8fc1d297ee

Aliases

arxiv: 1310.5656 · arxiv_version: 1310.5656v3 · doi: 10.48550/arxiv.1310.5656 · pith_short_12: FZR2NAUBRX2I · pith_short_16: FZR2NAUBRX2IYEZI · pith_short_8: FZR2NAUB

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/FZR2NAUBRX2IYEZIZGGH6ONAUE \
  | 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: 2e63a682818df48c1328c98c7f39a0a12505c4567fed2be194a2ba8fc1d297ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd430a8cbc92756ce5e52de2f59bfee5b02d43fe9b03fe09d6b97844bc7e977b",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2013-10-21T17:42:33Z",
    "title_canon_sha256": "486cbfe43c16b0292777c5e03b2bc69d8295239e0881db4de26457366e88747f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.5656",
    "kind": "arxiv",
    "version": 3
  }
}