P P 1 2
نویسندگان
چکیده
In the paper, we consider the problem of computing visibility information on digital terrain models. Visibility problems on polyhedral terrains are classi ed according to the kind of visibility information computed into point visibility, line visibility and region visibility. A survey of the state-of-the-art of the algorithms for computing visibility is presented, according to the classi cation introduced.
منابع مشابه
4.3 Modiied Variants and Weaknesses 4 the Attack on Lucifer 3 Conditional Characteristics
Round output diierence input diierence p icb key fraction P = (f7g; 0) 1 A = 0 a = 0 1 1 2 B = f45g b = f7g p = 1=8 0 1/2 3 C = f6g c = f45g p = 1=8 1 1/2 4 f45g f6; 7g p = 1=8 0 1/2 5 0 0 1 1 6 f45g f6; 7g p = 1=8 0 1/2 7 f6g f45g p = 1=8 1 1/2 8 f45g f7g p = 1=8 0 1/2 9 0 0 1 1 8 f39g f7g p = 1=8 1 1/2 9 f7g f39g p = 1=8 1 1/2 T = (0; f39g) 17 ent fractions of the key space. Round output diie...
متن کاملOptimal Inequalities among Various Means of Two Arguments
and Applied Analysis 3 2. Lemmas In order to establish our main results we need two inequalities, which we present in this section. Lemma 2.1. If r ∈ 0, 1 , then g t − [ t2 t 1 2r /3 1 − 2r ( t 1 2r /3 1 t )] log t 1 − r ( t 1 2r /3 2 − t 1 2r /3 t2 − 1 ) > 0 2.1 for t ∈ 1, ∞ . Proof. Let p 1 2r /3, g1 t t1−pg ′ t , g2 t tg ′ 1 t , g3 t t 1−pg ′ 2 t , g4 t t g ′ 3 t , g5 t t3−pg ′ 4 t , g6 t t ...
متن کاملDECOMPOSITION OF PASCAL ’ S KERNELS MOD p s Richard
For a prime p we define Pascal’s Kernel K(p, s) = [k(p, s)ij] ∞ i,j=0 as the infinite matrix satisfying k(p, s)ij = 1 ps ( i+j j ) mod p if ( i+j j ) is divisible by p and k(p, s)ij = 0 otherwise. While the individual entries of Pascal’s Kernel can be computed using a formula of Kazandzidis that has been known for some time, our purpose here will be to use that formula to explain the global geo...
متن کاملApproximations and more PMFs and PDFs
1 Approximation of binomial with Poisson Consider the binomial distribution b(k, n, p) = n k p k (1 − p) n−k , 0 ≤ k ≤ n Assume that n is large, and p is small, but np → λ at the limit. For a fixed λ: b(0, n, p) = n 0 p 0 (1 − p) n = (1 − p) n = (1 − λ/n) n → e −λ b(1, n, p) = n 1 p(1 − p) n−1 = np 1 − p b(0, n, p) = λ 1 − λ/n b(0, n, p) → λe −λ b(2, n, p) = n 2 p 2 (1 − p) n−2 = n(n − 1)p 2 2(...
متن کاملOn primitive roots of 1 mod p k, divisors of p 2 − 1, Wieferich primes and quadratic analysis mod p 3
On primitive roots of 1 mod p k , divisors of p 2 − 1 , Wieferich primes and quadratic analysis mod p Abstract Primitive roots of 1 mod p k (k > 2 and odd prime p) are sought, in cyclic units group G k ≡ A k B k mod p k , coprime to p, of order (p − 1)p k−1. 'Core' subgroup A k has order p − 1 independent of precision k, and 'extension' subgroup B k of all p k−1 residues 1 mod p is generated by...
متن کاملExtinction and Nonextinction for the Fast Diffusion Equation
and Applied Analysis 3 3. Main Results In this section, by applying the energy method introduced in [11] and the comparison result in Lemma 3 of the problem (8), we give the main results on the extinction and nonextinction of the solution to the problem (1). 3.1. Extinction of the Solution. In this subsection, we consider the extinction of the solution to the problem (1) and give the conditions...
متن کامل