Questions without answers in TIFR

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True/False Question:Given any integer $n\geq 2$, we can always finds an integer $m$ such that each of the $n-1$ consecutive integers $m+2,m+3,\dots,m+n$ are composite.
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2
True/False Question:The $10 \times 10 $ matrix $\begin{pmatrix} v_{1}w_{1} & \cdots&v_{1}w_{10} \\ v_{2}w_{2}& \cdots & v_{2}w_{10}\\ v_{10}w_{1}&\cdots & v_{10}w_{10} \e...
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True/False Question:If every continuous function on $X\subset \mathbb{R}^{2}$ is bounded, then $X$ is compact.
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True/False Question:The graph of $xy=1$ is $\mathbb{C}^{2}$ is connected.
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5
True/False Question:Consider the differential equations (with $y$ is a function of $x$)$\begin{matrix} \frac{dy}{dx} & = & y\\ y\left ( 0 \right ) & = & 0 \end{matrix}$$\...
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True/False Question:Let $f : \mathbb{R}^{2}\rightarrow \mathbb{R}$ be a continuous function. Then the derivative $\frac{\partial ^{2}f}{\partial x\partial y}$ can exist w...
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True/False Question:If $f$ is continuous on $\left [ 0,1 \right ]$ and if $\int_{0}^{1}f\left ( x \right )x^{n}dx=0$ for $n=1,2,3,\cdots .$ .Then $\int_{0}^{1}f^{2}\left...
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8
True/False Question:Suppose that $f \in \mathfrak{L}^{2} \left ( \mathbb{R} \right )$. Then $f \in \mathfrak{L}^{1} \left ( \mathbb{R} \right )$.
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9
True/False Question:The Integral$$\int_{-\infty }^{+\infty }\frac{e^{-x}}{1+x^{2}}\:dx$$is convergent.
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True/False Question:If $A\subset \mathbb{R}$ and open then the interior of the closure $\overset{-0}{A}$is $A$.
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True/False Question:If $f \in C^{\infty }$ and $f^{\left ( k \right )}\left ( 0 \right )=0$ for all integer $k\geq 0$, then $f\equiv 0$.
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True/False Question:Let $f:\left [ 0,1 \right ]\rightarrow \left [ 0,1 \right ]$be continuous then $f$ assumes the value $\int_{0}^{1}f^{2}\left ( t \right )dt$ somewher...
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13
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14
True/False Question:The functions $f\left ( x \right )=x\left | x \right |$ and $x\left | sin\:x \right |$ are not differentiable at $x=0$.
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15
True/False Question:The composition of two uniformly continuous functions need not always be uniformly continuous.
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16
True/False Question:$A\in M_{2}\left ( \mathbb{C} \right )$and $A$ is nilpotent then $A^{2}=0$.
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True/False Question:Let $P$ be an $n \times n $ matrix whose row sums equal $1$. Then for any positive integer $m$ the row sums of the matrix $p^{m}$ equal $1$.
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18
True/False Question:There is a non trivial group homomorphism from $C$ to $R$.
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19
True/False Question:Any $3\times3$ and $5\times5$ skew-symmetric matrices have always zero determinants.
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20
True/False Question:The rank of the matrix$$\begin{bmatrix} 11 &12 &13 &14 \\ 21& 22 &23 & 24\\ 31& 32 &33 &34 \\ 41&42 & 43 & 44 \end{bmatrix}$$is $2$.
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21
True/False Question:The number $2$ is a prime in $\mathbb{Z}\left [ i \right ]$.
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22
True/False Question:There exist polynomials $f\left ( x \right )$ and $g\left ( x \right )$, with complex coefficients, such that $\left ( \frac{f\left ( x \right )}{g\le...
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23
True/False Question:Let $f$ be real valued, differentiable on $\left ( a,b \right )$ and ${f}'\left ( x \right )\neq 0$ for all $x \in \left ( a,b \right )$. Then $f$ is ...
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24
True/False Question:The inequality $\sum _{n=0}^{\infty }\frac{\left ( log \: log2 \right )^{n}}{n!} \frac{3}{5}$ holds.
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True/False Question:Every subgroup of order $74$ in a group of order $148$ is normal.
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27
True/False Question:The inequality$$\sqrt{1+x}< 1+x/2$$for $x\in \left ( -1, 10 \right )$is true
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True/False Question:If $n$ is not a multiple of $23$ then the remainder when $n^{11}$ is divided by $23$ is $\pm 1$( mod $23$).
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True/False Question:Suppose $A$ is a nilpotent matrix and $I$ is the identity matrix. Then $\left ( I+A \right )$ is invertible.
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True/False Question:The equations$$x_{1}+\frac{1}{2}x_{2}+\frac{1}{3}x_{3}=1$$$$x_{1}+\frac{1}{4}x_{2}+\frac{1}{9}x_{3}=1$$$$x_{1}+\frac{1}{8}x_{2}+\frac{1}{27}x_{3}=1$$h...
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