🧭 New here?
Take a guided tour of the site.
← Back to Papers

Results & Lemmas (12)

Each result is auto-extracted from the paper via OCR - the math is shown verbatim and may carry occasional transcription artifacts. Click to expand the full statement.

Lemma 1. Lemma 1. Let ϕi(z) ∈MS∗(αi) where 0 ≤αi < 1 (i = 0, 1, 2,..., k −1). Then for k −1 ≤ k−1  i=0 αi < k, we have zk−1 k−1  i=0 ϕi(z) ∈MS∗…
Lemma 1. Let ϕi(z) ∈MS∗(αi) where 0 ≤αi < 1 (i = 0, 1, 2, ..., k −1). Then for k −1 ≤ k−1  i=0 αi < k, we have zk−1 k−1  i=0 ϕi(z) ∈MS∗ k−1  i=0
Lemma 2 Lemma 2 (see [2]). Suppose that h(z) = 1 z + ∞  n=1 cnzn ∈MS∗ (2.6) Then |cn| ≤ 2 n + 1 (n ∈N) (2.7) Each of these inequality is sharp,…
Lemma 2 (see [2]). Suppose that h(z) = 1 z + ∞  n=1 cnzn ∈MS∗ (2.6) Then |cn| ≤ 2 n + 1 (n ∈N) (2.7) Each of these inequality is sharp, with the extremal function given by h(z) = z−1
Lemma 3 Lemma 3 (see [1]). Let p ∈P[A, B] and p(z) = 1 + ∞  n=1 cnzn Then |cn| ≤A −B This result is sharp.
Lemma 3 (see [1]). Let p ∈P[A, B] and p(z) = 1 + ∞  n=1 cnzn Then |cn| ≤A −B This result is sharp.
Lemma 4 Lemma 4 (see [4]). Let p ∈P[A, B], then for |z| = r < 1 1 −Ar 1 −Br ≤Rep(z) ≤|p(z)| ≤1 + Ar 1 + Br (2.9) These bounds are sharp.
Lemma 4 (see [4]). Let p ∈P[A, B], then for |z| = r < 1 1 −Ar 1 −Br ≤Rep(z) ≤|p(z)| ≤1 + Ar 1 + Br (2.9) These bounds are sharp.
Lemma 5 Lemma 5 (see [7]) Suppose that g ∈MS∗, then (1 −r)2 r ≤|g(z)| ≤(1 + r)2 r (|z| = r; 0 < r < 1) (2.10)
Lemma 5 (see [7]) Suppose that g ∈MS∗, then (1 −r)2 r ≤|g(z)| ≤(1 + r)2 r (|z| = r; 0 < r < 1) (2.10)
Lemma 6 Lemma 6(see [6]). Let −1 ≤B2 ≤B1 < A1 ≤A2 ≤1. Then 1 + A1z 1 + B1z ≺1 + A2z 1 + B2z (2.11)
Lemma 6(see [6]). Let −1 ≤B2 ≤B1 < A1 ≤A2 ≤1. Then 1 + A1z 1 + B1z ≺1 + A2z 1 + B2z (2.11)
Theorem 1 Theorem 1 Let g(z) = 1 z + ∞  n=1 bnzn ∈MS∗ k−1 k
Theorem 1 Let g(z) = 1 z + ∞  n=1 bnzn ∈MS∗ k−1 k
Theorem 2. Theorem 2. Let f(z) given by (1.1) and −1 ≤B < A ≤1. if ∞  n=1
Theorem 2. Let f(z) given by (1.1) and −1 ≤B < A ≤1. if ∞  n=1
Theorem 3. Theorem 3. Let f ∈MK(k)[A, B] (−1 ≤B < A ≤1) and gk(z) is given by (1.1) and (1.14) respectively. Then for k ≥1, we have n  k=1 |kak +…
Theorem 3. Let f ∈MK(k)[A, B] (−1 ≤B < A ≤1) and gk(z) is given by (1.1) and (1.14) respectively. Then for k ≥1, we have n  k=1 |kak + Bk|2 − n−1  k=1 |A.Bk + kBak|2 < (A −B)2 (3.4)
Theorem 4. Theorem 4. Suppose that f(z) = 1 z + ∞  n=1 anzn ∈MK(k) [A, B] Then |an| ≤(A −B) n  −1 + 2 n  m=1
Theorem 4. Suppose that f(z) = 1 z + ∞  n=1 anzn ∈MK(k) [A, B] Then |an| ≤(A −B) n  −1 + 2 n  m=1
Theorem 5. Theorem 5. Let f ∈MK(k)[A, B]. Then (1 −r)2 r2 1 −Ar 1 −Br  ≤|f ′(z)| ≤(1 + r)2 r2 1 + Ar 1 + Br  (|z| = r, 0 < r < 1) (3.12)
Theorem 5. Let f ∈MK(k)[A, B]. Then (1 −r)2 r2 1 −Ar 1 −Br  ≤|f ′(z)| ≤(1 + r)2 r2 1 + Ar 1 + Br  (|z| = r, 0 < r < 1) (3.12)
Theorem 6. Theorem 6. Let −1 ≤B2 ≤B1 < A1 ≤A2 ≤1. Then MK(k) (A1, B1) ⊂MK(k) (A2, B2) (3.13)
Theorem 6. Let −1 ≤B2 ≤B1 < A1 ≤A2 ≤1. Then MK(k) (A1, B1) ⊂MK(k) (A2, B2) (3.13)
Function classes studied:

Related Papers

Certain subclass of Meromorphic function associated with Wright function
2026
Revisit Of Meromorphic Convex Functions
2025
Φ-like analytic functions associated with a vertical domain
2023
Some applications of q-difference operator involving a family of meromorphic har
2021
v27,no01,1996,p015_026_OCR
2021
↑↓ navigate openesc close
✦ You're explorer #4,835 to wander the registry - thanks for stopping by. Tell us what you'd like to see →
💬 Feedback