Pith Number

pith:HSNIB56S

pith:2016:HSNIB56SYOS6W4CCD2JBKRTJI2

not attested not anchored not stored refs pending

Extension operators for smooth functions on compact subsets of the reals

Enrique Jorda, Jochen Wengenroth, Leonhard Frerick

arxiv:1611.06808 v1 · 2016-11-21 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HSNIB56SYOS6W4CCD2JBKRTJI2}

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	2026-05-18T00:57:32.820762Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c9a80f7d2c3a5eb70421e92154669469a8b7fb503687cffbc8c73e872cc498c

Aliases

arxiv: 1611.06808 · arxiv_version: 1611.06808v1 · doi: 10.48550/arxiv.1611.06808 · pith_short_12: HSNIB56SYOS6 · pith_short_16: HSNIB56SYOS6W4CC · pith_short_8: HSNIB56S

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/HSNIB56SYOS6W4CCD2JBKRTJI2 \
  | 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: 3c9a80f7d2c3a5eb70421e92154669469a8b7fb503687cffbc8c73e872cc498c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b22212f4ffc03abc5977a4538eb636555ae705555c601013dc5f7f85571a8680",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2016-11-21T14:37:21Z",
    "title_canon_sha256": "7d62ab7754781f510cf0ebf910c134fa20ea3a85518674d5bb1b3f489e94825c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.06808",
    "kind": "arxiv",
    "version": 1
  }
}