Simplification of Context-Free Grammars
Simplification of Context-Free Grammars
... Form
A context-free grammar G = (V, T, S, P)
is in Chomsky
normal form iff all productions are of the form:
A → BC
or
A → a
where A, B, C ∈ V and a ∈ T.
2
Simplification of Context-Free
Grammars
•
Some ... combination.
Exception: if all x
i
are nullable, then A → λ is not put into P^.
Simplification of Context-Free
Grammars
Quan Thanh Tho
qttho@cse.hcmut.edu.vn
20
Exa...
The grammar of english grammars
... Section II.
Of Pronunciation Article I. Powers of Letters Article II. Of Quantity Article III. Of Accent Section III. Of
Elocution Article I. Of Emphasis Article II. Of Pauses Article III. Of Inflections ... I.
Of Letters; Capitals Corrections under each of the 16 Rules Promiscuous corrections of Capitals
Chapter II.
Of Syllables Corrections of False Syllabication...
Báo cáo khoa học: "Enhancing Performance of Lexicalised Grammars" pdf
... the
efficiency of a parser with a possible trade-off of los-
ing correct parses. For example, the noun phrase
reading of The dog barks is a correct parse, although
unlikely. By blocking the use of barks ... available, it was
possible to evaluate the accuracy of the parser. Eval-
uation of deep parsing results is often reported only
in terms of coverage (number of sentences whic...
Báo cáo khoa học: "Extending Lambek grammars: a logical account of minimalist grammars" pot
... definition of Min-
imalist grammars, that are Stabler’s
formalization of Chomsky’s minimal-
ist program. Our logical definition
leads to a neat relation to catego-
rial grammar, (yielding a treatment
of ... picture of these logical grammars
is as follows. A lexicon maps words (or, more
generally, items) onto a logical formula, called
the (syntactic) type of the word. Types are de-...
Báo cáo khoa học: "Polynomial Learnability and Locality of Formal Grammars" doc
... possible grammars having at most
k of these rules. Since each k-simple component of 0
has at most k rules, the generated set of grammars will
include all of the k-simple components of G. Step ... parameters (of accuracy and robustness)
as well as the size (complexity) of the language being
learned.
In this paper, we apply the criterion of polynomial
learnability to s...
Báo cáo khoa học: "OPTIMIZING THE COMPUTATION ALL EXICALIZATION OF LARGE GRAMMARS" pptx
...
to evaluate the complexity of the algorithms as
a function of the size of the grammar, we
assume that I V I and I GI are of the same order
of magnitude n. Step 1 of the algorithm
corresponds ... kinds of grammars, the algorithm
has been tested on eight randomly generated
grammars of 4,000 rules having from 2 to 10
potential anchors (Table 1). The lexicon of the
fir...
Báo cáo khoa học: "AUTOMATED INVERSION OF LOGIC GRAMMARS FOR GENERATION" pdf
... subset of
MSEA
is essential.
A collection of minimal sets of essential argu-
ments
(MSEA's)
of a predicate depends upon the way
this predicate is defined. If we alter the ordering of ... in the definition of a predicate, we
may also change its set of
MSEA's.
We call the set
of
MSEA's
existing for a current definition of a predi-
cate the set of...
Báo cáo khoa học: "Computational Aspects of M-grammars" potx
... gram-
mar consists of ~ set of subgrammars. Each of the sub-
grammars contains a set of M-rules and a regular ex-
pression over the alphabet of rule names. The set of
M-rules is subdivided into ... set of possi-
ble S-trees and F~ is a collection of relations of type
T m × T, m > 0. F~ contains all relations defined by
the M-rules of subgrammar i.
s The set of...
Báo cáo khoa học: "Metagrammar Engineering: Towards systematic exploration of implemented grammars" pptx
... system-
atic exploration of grammars through compar-
ison of competing analyses. The idea is illus-
trated through a comparative study of auxil-
iary structures in HPSG-based grammars for
German and ... auto-
matically create grammars with either of the two
analyses.
The remainder of this paper starts with the case
study. Section 2 provides a description of the con-
text of...
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