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FREDHOLM THEORY FOR ABSTRACT AND DIFFERENTIAL EQUATIONS WITH NONCOMPACT NONLINEAR PERTURBATIONS OF FREDHOLM MAPSPETRYSHYN WV.1979; J. MATH. ANAL. APPL.; USA; DA. 1979; VOL. 72; NO 2; PP. 472-499; BIBL. 47 REF.Article

ON THE SOLVABILITY OF X APPARTIENT A TX+LAMBDA FX IN QUASINORMAL CONES WITH T AND FK-SET-CONTRACTIVEPETRYSHYN WV.1981; NONLINEAR ANAL., THEORY METHODS APPL.; GBR; DA. 1981; VOL. 5; NO 5; PP. 585-591; BIBL. 18 REF.Article

NONLINEAR EIGENVALUE PROBLEMS AND THE EXISTENCE OF NONZERO FIXED POINTS FOR A-PROPER MAPPINGSPETRYSHYN WV.1978; ABH. AKAD. WISSENSCH. D.D.R., MATH. NATURWISSENSCH. TECH.; DDR; DA. 1978; NO 6; PP. 215-227; BIBL. 28 REF.Conference Paper

BIFURCATION AND ASYMPTOTIC FOR EQUATIONS INVOLVING A-PROPER MAPPINGS WITH APPLICATIONS TO DIFFERENTIAL EQUATIONS.PETRYSHYN WV.1978; J. DIFFER. EQUATIONS; U.S.A.; DA. 1978; VOL. 28; NO 1; PP. 124-154; BIBL. 1 P. 1/2Article

VARIATIONAL SOLVABILITY OF QUASILINEAR ELLIPTIC BOUNDARY VALUE PROBLEMS AT RESONANCEPETRYSHYN WV.1981; NONLINEAR ANAL.; ISSN 0362-546X; USA; DA. 1981; VOL. 5; NO 10; PP. 1095-1108; BIBL. 22 REF.Article

SOLVABILITY OF LINEAR AND QUASILINEAR ELLIPTIC BOUNDARY VALUE PROBLEMS VIA THE A-PROPER MAPPING THEORYPETRYSHYN WV.1980; NUMER. FUNCT. ANAL. OPTIM.; ISSN 0163-0563; USA; DA. 1980 PUBL. 1981; VOL. 2; NO 7-8; PP. 591-635; BIBL. 46 REF.Article

SOLVABILITY OF SEMILINEAR ELLIPTIC BOUNDARY VALUE PROBLEMS AT RESONANCE VIA THE A-PROPER TYPE OPERATOR THEORYPETRYSHYN WV.1979; AN. STIINT. UNIV. "AL. I. CUZA" IASI, SECT. 1A; ISSN 0041-9109; ROM; DA. 1979; VOL. 25; SUPPL.; PP. 133-152; BIBL. 47 REF.Article

USING DEGREE THEORY FOR DENSELY DEFINED A-PROPER MAPS IN THE SOLVABILITY OF SEMILINEAR EQUATIONS WITH UNBOUNDED AND NONINVERTIBLE LINEAR PARTPETRYSHYN WV.1980; NONLINEAR. ANAL., THEORY METHODS APPL.; GBR; DA. 1980; VOL. 4; NO 2; PP. 259-281; BIBL. 40 REF.Article

ON THE SOLVABILITY OF NONLINEAR EQUATIONS INVOLVING ABSTRACT AND DIFFERENTIAL OPERATORSPETRYSHYN WV.1979; LECTURE NOTES MATH.; DEU; DA. 1979; NO 701; PP. 209-247; BIBL. 32 REF.Article

NOTE ON THE SOLVABILITY OF EQUATIONS INVOLVING UNBOUNDED LINEAR AND QUASI-BOUNDED NONLINEAR OPERATORS.PETRYSHYN WV.1976; J. MATH. ANAL. APPL.; U.S.A.; DA. 1976; VOL. 56; NO 3; PP. 495-501; BIBL. 15 REF.Article

SOLVABILITY OF NEUMANN BV PROBLEMS FOR NONLINEAR SECOND-ORDER ODES WHICH NEED NOT BE SOLVABLE FOR THE HIGHEST-ORDER DERIVATIVEPETRYSHYN WV; YU ZS.1983; JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS; ISSN 0022-247X; USA; DA. 1983; VOL. 91; NO 1; PP. 244-253; BIBL. 10 REF.Article

SOME APPLICATIONS OF A-PROPER MAPPINGFITZPATRICK PM; PETRYSHYN WV.1979; NONLINEAR ANAL., THEORY METHODS APPL.; GBR; DA. 1979; VOL. 3; NO 4; PP. 525-532; BIBL. 15 REF.Article

EXTENSION OF NONLINEAR DENSELY DEFINED OPERATORS, RATES OF CONVERGENCE FOR THE ERROR AND THE RESIDUAL, AND APPLICATION TO DIFFERENTIAL EQUATIONS.CONJURA E; PETRYSHYN WV.1978; J. MATH. ANAL. APPL.; USA; DA. 1978; VOL. 64; NO 3; PP. 651-694; BIBL. 49 REF.Article

POSITIVE EIGENVALUES FOR NONLINEAR MULTIVALUED CONCOMPACT OPERATORS WITH APPLICATIONS TO DIFFERENTIAL OPERATORS.FITZPATRICK PM; PETRYSHYN WV.1976; J. DIFFER. EQUATIONS; U.S.A.; DA. 1976; VOL. 22; NO 2; PP. 428-441; BIBL. 18 REF.Article

CONTINUATION AND SURJECTIVITY THEOREMS FOR UNIFORM LIMITS OF A-PROPER MAPPINGS WITH APPLICATIONS.MILOJEVIC PS; PETRYSHYN WV.1978; J. MATH. ANAL. APPL.; U.S.A.; DA. 1978; VOL. 62; NO 2; PP. 368-400; BIBL. 1 P. 1/2Article

PERIODIC SOLUTIONS OF NONLINEAR SECOND-ORDER DIFFERENTIAL EQUATIONS WHICH ARE NOT SOLVABLE FOR THE HIGHEST DERIVATIVEPETRYSHYN WV; YU ZS.1982; J. MATH. ANAL. APPL.; ISSN 0022-247X; USA; DA. 1982; VOL. 89; NO 2; PP. 462-488; BIBL. 34 REF.Article

GALERKIN METHODS IN THE CONSTRUCTIVE SOLVABILITY OF NONLINEAR HAMMERSTEIN EQUATIONS WITH APPLICATIONS TO DIFFERENTIAL EQUATIONS.FITZPATRICK PM; PETRYSHYN WV.1978; TRANS. AMER. MATH. SOC.; USA; DA. 1978; VOL. 238; NO 515; PP. 321-340; BIBL. 11 REF.Article

CONTINUATION THEOREMS AND THE APPROXIMATION-SOLVABILITY OF EQUATIONS INVOLVING MULTIVALUED A-PROPER MAPPINGS.MILOJEVIC PS; PETRYSHYN WV.1977; J. MATH. ANAL. APPL.; U.S.A.; DA. 1977; VOL. 60; NO 3; PP. 658-692; BIBL. 2 P.Article

FIXED-POINT THEOREMS FOR MULTIVALUED NONCOMPACT INWARD MAPS. = THEOREMES DU POINT FIXE POUR DES APPLICATIONS INTERIEURES MULTIVOQUES NON COMPACTESPETRYSHYN WV; FITZPATRICK PM.1974; J. MATH. ANAL. APPL.; U.S.A.; DA. 1974; VOL. 46; NO 3; PP. 756-767; BIBL. 19 REF.Article

PERIODIC SOLUTIONS OF CERTAIN HIGHER ORDER NONLINEAR DIFFERENTIAL EQUATIONSPETRYSHYN WV; YU ZS.1983; NONLINEAR ANALYSIS; ISSN 0362-546X; USA; DA. 1983; VOL. 7; NO 1; PP. 1-13; BIBL. 14 REF.Article

EXISTENCE THEOREMS FOR HIGHER ORDER NONLINEAR PERIODIC BOUNDARY VALUE PROBLEMSPETRYSHYN WV; YU ZS.1982; NONLINEAR ANAL.; ISSN 0362-546X; USA; DA. 1982; VOL. 6; NO 9; PP. 943-969; BIBL. 26 REF.Article

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