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- Gabriele Ricci
- 2006

Unfortunately, the journal retyped it from a printed copy, instead of receiving that source, and did not require proof corrections. The ensuing misprints, particularly the ones for functional notation, are misleading. Also, section numbering is shifted: e.g., present 3.5 corresponds to 4.6 in the published version. In spite of this mishap, the journal was… (More)

- Gabriele Ricci, G. Ricci
- 2001

Boolean matrices, the incidence matrices of a graph, are known not to be the (universal) matrices of a Boolean algebra. Here, we also show that their usual composition cannot make them the matrices of any algebra. Yet, later on, we " show " that it can. This seeming paradox comes from the hidden intrusion of a widespread set-theoretical (mis) definition and… (More)

The accidental ingestion of a foreign body into the gastrointestinal tract is not uncommon, but the vast majority of foreign bodies pass through the gastrointestinal tract uneventfully within a week. Less than 1% of patients with foreign body ingestion develop complications such as perforation of the gastrointestinal tract. The migration of an ingested… (More)

- Gabriele Ricci
- 2004

To binary trees, two-ary integers are what usual integers are to natural numbers, seen as unary trees. We can represent two-ary integers as binary trees too, yet with leaves labelled by binary words and with a structural restriction. In a sense, they are simpler than the binary trees, they relativize. Hence, contrary to the extensions known from Arithmetic… (More)

- Gabriele Ricci, G. Ricci
- 2007

The abstract representation-free Algebra of the past century is unable to formalize algebra sameness. A counterexample shows a universal transformation that cannot be representation-free. Then, to define transformations between based universal algebras we must introduce the representations corresponding to the bases, contrary to what was possible in general… (More)

- Gabriele Ricci, G. Ricci
- 2013

We propose the notion of flocks, which formerly were introduced only in based algebras, for any universal algebra. This generalization keeps the main properties we know from vector spaces, e.g. a closure system that extends the subalgebra one. It comes from the idempotent elementary functions, we call " interpolators " , that in case of vector spaces merely… (More)

Background. Parathyroid carcinoma is an infrequent clinical entity whose diagnosis is very challenge. Indeed a pre-operative or intraoperative diagnosis of parathyroid carcinoma is reported in less than half cases described in the literature. Patients and Methods. A systematic review of pathological reports of our secondary referral hospital was done. From… (More)

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