Pith Number

pith:KTNJRIOH

pith:2019:KTNJRIOHT6GEI735NHJ3K4FED2

not attested not anchored not stored refs pending

A note on the best approximation in spaces of affine functions

Maysam Maysami Sadr

arxiv:1907.10027 v1 · 2019-07-23 · 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{KTNJRIOHT6GEI735NHJ3K4FED2}

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	2026-05-17T23:39:49.367824Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54da98a1c79f8c447f7d69d3b570a41ea2fed6589b9c8dbbcdbbd2e6a93ae7c5

Aliases

arxiv: 1907.10027 · arxiv_version: 1907.10027v1 · doi: 10.48550/arxiv.1907.10027 · pith_short_12: KTNJRIOHT6GE · pith_short_16: KTNJRIOHT6GEI735 · pith_short_8: KTNJRIOH

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/KTNJRIOHT6GEI735NHJ3K4FED2 \
  | 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: 54da98a1c79f8c447f7d69d3b570a41ea2fed6589b9c8dbbcdbbd2e6a93ae7c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6d73ae487ab8849b02dc260b833b934fde23a2f9267b6cde444f8062d3a23f5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2019-07-23T17:34:34Z",
    "title_canon_sha256": "4db4709572bbaca507d9d62c9277671ebaa8618530af32bdca682eadae05f35b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.10027",
    "kind": "arxiv",
    "version": 1
  }
}